If you are going to push this modification on soraka than create this item

A item only soraka can buy that work exactly as mejai, have the same price of mejai, that substitute mejai, but that also increase soraka self healing** ap ratio** by the stacks. For example, 25 stacks having 1.5 ap ratio.

I have 670k of maestry with soraka, hit master tier 2 times playing only her in brazil, as the best soraka player from brazil, and i am very passionate player and i love this character more than i like the game. Please don't kill her high risk reward system [previous being staying in low health to heal more with starcall] completely. Add some high risk, hard mechanic that only flawless awesome sorakas can pull out, as this is the way i play her usually.

I also created this topic on the subject: http://boards.na.leagueoflegends.com/de/c/gameplay-balance/Ajo2ZA1X-i-was-the-top-soraka-player-from-my-country

Please don't ignore me. I created so many posts that i can't even count and would make my day if someone answered this to hear my thoughts.

Maybe the answer is not that, or maybe soraka self healing ap ratios should increase with her ap itself. I want to expose my experience and ideas to riot.