Hello Im DJ Kinet1c and this is my fist guide to one of my favorite champs. Ive been playing Sona for along time as a support, but after some bad ADC's I made a change to AP Mid Sona. I find her to be a great team pick for mid lane even though she is not a conventional pick she can be very effective if played properly.

PROS

Excellent Harass
Heals through enemy poke
Scales well into late game
Aoe Stun
Ranged slow with Power Cord 'E'
Great for chase or disengage

Cons

Very Squishy
Needs Lich Bane and Powercord aa for real dog
Mana issues
Stuns usually means death or forced back
People treat you as a support

AP Sona is heavily reliant on 2 aspects. The first being her Q which damages 2 targets around her. The second being her power chord which according to the last spell cast gives her next AA a special effect. The way I play Sona I force power chords by spamming spells trying to use her E as the second spell which will grant movement speed and que power chord. I then with the speed boost charge into range of the enemy lamer and use Q followed by an AA which will do double dmg with the Q power chord ability. This at low levels will chunk the laner enough to make them think twice about trying to poke you back. Once you get Lich Bane however this ability should reduce most AP casters to half health or lower scaring the **** outta them. I should be pretty self explanatory then why u level your Q first. After Q I level heal (W) which will give you pretty much infinite lane sustain. As for ganks by yours or their jungler, you should if you have power chord up try and power chord a W as this will chunk and slow the opponent. After you have them slowed you can use your ultimate to stun them and secure the kill.