Mid-Lane Sona Rework Idea

After doing a little lot of trial and error from home, this re-up Sona rework idea should fare a little better than the former off-top guide I put out already. Hope you enjoy this version!

[Q] - Sona's basic attacks passively inflict 5/8/11/14/17 (+10% AP) magic damage for 4s following this spell. On cast, Sona fires 3 bursts of sound up to 600D over 0.45s, each inflicting 15/30/45/60/75 (+25% AP) magic damage on all enemies in the path. The Power Chord's maxed charge causes the bearer's next basic attack to inflict 10/20/30/40/50 (+30% AP) bonus magic damage. <Mana> 40/45/50/55/60 <CD> 7

[W] - Sona's basic attacks passively heal her for 3/6/9/12/15 (+5% AP) health per hit for 4s following this spell. On cast, Sona shrouds herself with revitalizing tones, healing herself and allied Champions within 350D for 10/18/26/34/42 (+10% AP) health every second while draining 30/34/38/42/46 Mana. Power Chord's maxed charge causes the bearer's next basic attack to apply Grievous Wounds to the target for 4s. <CD> 2

[E] - Sona's basic attacks passively give her 12/15/18/21/24 flat Movement for 1s per hit for 4s following this spell. On cast, Sona releases a motivating beat to all allies within 400D, increasing their Movement by 15/18/21/24/27% (+1% per 60 AP) decaying over 3s while Sona recieves half of the value decaying over 5s. Power Chord's maxed charge causes the bearer's next basic attack to Slow the target by 25% for 3s. <Mana> 60/70/80/90/100 <CD> 14

[R] - Sona blasts a finale of powerful sound in a 650D line, inflicting 150/225/300 (+85% AP) magic damage on all enemy Champions hit and Stunning them for 1.25s with a cosmetic dance imput. Sona's normal spells also have their cooldowns reduced by 0.75s per Champion hit by this spell. <Mana> 200 <CD> 150/125/100

Ability "Power Chord" - Sona gathers power in her instrument's amplifier ever time she uses a normal spell. At 3 stacks, her next basic attack can inflict 7 (+3 x Lv) plus 5% AP per ultimate rank. Sona also has the option to transfer this charged passive plus any following buff from a used normal spell to an allied Champion via "hitting" them with a basic attack. Sona cannot pass following buffs if Power Chord is not maxed.