My name is Rúben. I`m 17 and play League of Legends since the beginning of season 2. I am currently in master 100 lps and have as main role AD Carry. Kalista being one of my favorite champions I decided to make a guide for her.

PROS:
-Really good against tanks
-Good mobility and chase potential
-Best kite of the game
-Strong 1v1
-Snowballs easily
- Strong laning phase

CONS:
-Low range
-Bad wave clear

- Greater Quintessence of Attack Speed: With this build Kalista don't have alot of Atk Speed, with this she can get a good amount of Attack Speed and it's better for Kalista early game Harass and farm.


- Greater Mark of Attack Damage: This make easier for Kalista to farm in early game, and help with harass too.

- Greater Seal of Armor: This make you receive less damage from the enemy ADC and Support AA, its a good defensive Seal, you can put health seal too, but is situational.

- Greater Glyph of Magic Resist: This make you receive less damage from support, and some skills, its the best Glyph for Kalista, you can have [Greater Glyph of attak speed too)

Q
+Basic damage, depending on spell-level: 10 / 70 / 130 / 190 / 250
+Mana costs, depending on spell-level: 50 / 55 / 60 / 65 / 70
+AD Scaling: 100%
+Cooldown: 8 seconds


W
+Passive damage, depending on spell-level: 12 / 14 / 16 / 18 / 20% of target's maximum health
+Max passive damage on minions: 75 / 125 / 150 / 175 / 200
+Mana costs: 25
+Cooldown: 30 seconds (stacks up to 2)
+Range: 5500


E
+Basic damage, depending on spell-level: 10 / 70 / 130 / 190 / 250
+AD Scaling: 60%
+Damage per Additional Spears: 10 / 14 / 19 / 25 / 32 (+20% / 22.5% / 25% / 27.5% / 30% Attack Damage)
+Mana costs: 40
+Cooldowns, depending on spell-level: 14 / 12.5 / 11 / 9.5 / 8 seconds
+after 4 seconds the spears in the enemy disappear (if you aren't attack him)


R
+Cooldowns, depending on spell-level: 90 / 75 / 60
+Mana costs: 100
+Range: 1400

Annie is awesome support with Kalista. Her long autoattack range makes it possible to get the Sentinel(W) passive very often on your enemy. If you autoattack the marked enemys, you will poke the enemys to death! (You can autoattack first followed up by Annies' autoattack as well to get the extra damage on your enemys)

Thresh has a huge synergy with Kalista. And also thresh have a lot of cc.In addition, Thresh is pretty tanky so you can safely throw him in the teamfight.

Trading with Kalista is pretty hard before having your "First Back", especially when you are facing strong champions against her.
If you want to trade and try to win it before your "First Back", you'll need to poke your enemies using your E - Rend, but you'll need to pay attention to a detail, if E - Rend scores a kill (creep, jungle creep or champion kill), the cooldown is refreshed and refunds 20 mana for each target killed, up to 40 mana, so try to put the CS low using Basic Attacks on them and on your Enemies too and then, when the CS is low, press E - Rend and voilà, you are poking, farming and recovering a part of the mana that you spent trading so, you can do it again and again until you win the trade before going back for the first time in the game.
After your "First Back" in the game, everything becomes much more easier, especially when you have a Bilgewater Cutlass and a little bit of Attack Speed, trading becomes much more easier because now you can go for faster trades and burst your enemies much more faster.

When you're playing Kalista, team fighting is not that easy, because you need to have a pretty good positioning skill and a bit of protection from your team aswell.
Kalista is a very good engager. With her R - Fate's Call, Kalista is very good engaging or also getting picks.
Kalista is pretty like Katarina when we talk about team fighting. Kalista needs to wait for the enemie's hard CC and then, she can go in and kill everyone spreading his damage basic attacking with Runaan's Hurricane help and then burst'em with her E - Rend.

That was my Kalista Guide !

I hope you could learn from it.