Hey, I have a reading thread! >:(
I did half of it, the other half will come when I feel like spending another few hours quoting text. As always, some might be opinions, some might me being sleepy, most should be useful. This part is about 1000 words (including quotes), have fun!
I know it's not the most important part of your guide, but you might want to reconsider the hpen marks on URF. Also, you should definitely read up on basics of English verbs.
About Sona, Maven of the Strings
Masteries
Summoner Spells
Runes
Skills
Skill Sequence
Items
Carry Synergy
I think it's a bit weird to say you have a poke/sustain/CC (crowd control). Unless you want the emphasis to be on that it's exactly one ability, I'd write it like: "She has poke, sustain, a speed boost, CC, a slow and a nuke." A different option would be to add "spell" at the end of the sentence but not all of the things you listed are spells so I prefer the first.
Should be "Her kit". I'd also drop the "her" in "disrupt her enemies" because there are more than enough hers in that sentence already. Furthermore, small typo in "teamfights".
"that" can't be used like this. Option: "[...] Cooldown Reduction is way more important because it allows her to continuously use her auras to aid her team, [...]"
Minor nitpick: there's no
Oracle's Lens in your final build in the cheat sheet, but it is present here.
Sona has arguebly one of the best pokes in the game
"Arguably"
"Ultimate"
"Another problem is that" and "requires" instead of "requiring". (her kit requires good positioning)
The "her" in front of
Crescendo isn't necessary (though you can keep it there if you like), but "have" should be "has".
"supposed", "tends". Also in fact her spells are non-targeted (single t), not the champion itself. "While she can poke easily because
Hymn of Valor is non-targeted, she tends to accidentally hit things she's not supposed to, like minions."
I'd use "poke" here myself.
"has saved me more times than I could count".
Again, I'd use "poke".
Two things:
Hymn of Valor and
Power Chord can deal more damage with
Arcane Mastery, and
Arcane Mastery should be
Arcane Mastery
, which can be achieved using the following: [[arcane mastery mastery]].
"Sparingly", "has".
"has".
"rely".
"The function will be the same as when the ADC takes it, [...]"
Add a "during": "to poke harder during the laning phase".
Glyph of Ability Power can be used in the 6-3 Glyph setup
Greater Glyph of Ability Power.
"is -> they're" or just drop "is".
"to get away" or "getting away".
"or useful if" (incorrect but widely accepted afaic)
The banner says "Spells".
If I were you I'd do myself a favor and remove all those damage per level tables and descriptions of abilities. Mistakes are easy, they're a bit unreadable, updating takes a lot of time and all the info is readily available in the database.
"Best used in skirmishes when the enemy attempts to run."
"combined". Same for
Imbue
I think you meant "escaping" or "getting away" there :P
"its range".
"travel time".
The banner says "Spell Sequence".
"harassed".
"with poking".
"has".
"has".
"don't".
"can".
Mikael's Blessing is most likely the first big item you'll be getting as it allows you to cancel CC, which is vital to protecting your ADC and/or giving him an emergency heal.
"and/or to give an emergency heal."
"use" and drop the "they".
Vayne proc-ing his
Silver Bolts
"proccing", "her".
Twin Shadows, "an", "while it gives 10% less CDR and costs 100 gold more in exchange for 6% additional movement speed". Also: What are you comparing the item to?
"an" -> "a". Not sure if the hyphens are needed there.
"hasn't".
"or". (I think)
"become".
"enemies' heads".
"has".
"drawbacks". You did this twice.
"got".
Quinn have close to nothing
"has".
"However" -> "Also".
I did half of it, the other half will come when I feel like spending another few hours quoting text. As always, some might be opinions, some might me being sleepy, most should be useful. This part is about 1000 words (including quotes), have fun!
I know it's not the most important part of your guide, but you might want to reconsider the hpen marks on URF. Also, you should definitely read up on basics of English verbs.
About Sona, Maven of the Strings
Masteries
Summoner Spells
Runes
Skills
Skill Sequence
Items
Carry Synergy
About Sona, Maven of the Strings
Quoted:
She has a poke, a sustain, a speed boost, a CC, a slow and a nuke.
Quoted:
She kit revolves around buffing her allies with her active and using her
Crescendo to disrupt her enemies in teamfigths.

Quoted:
[...] Cooldown Reduction is way more important that allows her continuously use her auras to aid her team, followed by mana regeneration so she can constantly keep up her auras.
Minor nitpick: there's no

Quoted:

Quoted:
Her ultimte,
Quoted:
Another problem is her kit revolves around having auras, which requires her to be relatively close to the front line to buff her allies, and therefore, requiring good positioning.
Quoted:
Also, her only Crowd Control Ability is her
Crescendo, which have a whopping 180 second cooldown without CDR at level 1.


Quoted:
While she can poke easily because she is non-targetted, she tend to accidentally hit things she's not suppose to, like minions.

Masteries
Quoted:
Reduces enemy pokes.
Quoted:
While 1 second off
recall
doesn't seem like much, it had save me more times that I could count.

Quoted:
allowing more pokes or sustain.
Quoted:





Summoner Spells
Quoted:
(use it sparringly as it have a whooping 210 cooldown).
Quoted:
It is useful regardless of the phase of the game and the must have, especially if the enemy team have a champion who can dish out a lot of damage in a short time.
Quoted:
A situational pick if your enemy is loaded with champions who relies on life steal
Quoted:
The fuction will be usd as the same as when the ADC takes it, as an emergency health pack or to chase.
Runes
Quoted:
runes allow me to poke harder the laning phase.
Quoted:


Quoted:
Normally is used together with
Quoted:
are for easier warding and get away quicker
Quoted:
Also synergizes well with your
Song of Celerity or if you are against lanes

Skills
The banner says "Spells".
If I were you I'd do myself a favor and remove all those damage per level tables and descriptions of abilities. Mistakes are easy, they're a bit unreadable, updating takes a lot of time and all the info is readily available in the database.
Quoted:
Best when used in skirmishes to hit the enemy when he attempts to run.
Quoted:
It deals amazing damage against your enemies during laning phase, especially combines with your
Power Chord.

Quoted:
Combines with the
Power Chord

Quoted:
Similar to
Taric's [Imbue]],


Quoted:
as it makes chasing nearly impossible.
Quoted:
It is a really strong skill that stuns people within it's range.
Quoted:
a travelling time
Skill sequence
The banner says "Spell Sequence".
Quoted:
if you're being harass majorly
Items
Quoted:
deal more damage from poking
Quoted:
Also,
Sona clearly have slow movement speed

Quoted:
if your enemy team have a lot
Quoted:
other types of defensive items that doesn't have CDR
Quoted:
cam be used
Quoted:

Quoted:
when paired with AD champions who uses they attack-speed
Quoted:


Quoted:
Twin Shadows is a interesting choice on
Sona, while it gives less 10% CDR and cost 100 gold more in exchange for additional 6% movement speed, it is still a very sensible scouting tool.


Quoted:
regeneration and an very-handy-and-easy-to-use
Quoted:
Only get this if someone else haven't got it.
Carry Synergy
Quoted:
you can stop the support of the ADC from blocking
Quoted:
he will most likely run out of mana and becomes a ganking target.
Quoted:
to bash your enemies head in.
Quoted:
She have a relatively good range
Quoted:
One of the only drawback is
Quoted:
especially if he gotten
Quoted:

"However" -> "Also".
********'s a pretty good fertilizer
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