Sion suggestion

Edit: gotta love those ninja downvoters

I bet it was mentioned at least once before, but what if Sion used HEALTH instead of MANA to cast spells He gains health permamantly from his Soul Furnace passive [W] and in mid lategame he's the most beefiest champion.

Warning: I'm bad with number balancing, so take this only as badly made example!

What I'm proposing is:

• All of skills cost % of current hp (lets say 5%, which can increase to 10% at maxed ranks)
• His hp/5 needs to be increased
• 1 of his skills also slightly heals him when he damages units (like for every enemy minion hit by his shield Sion regains x% hp. Doubled for enemy champions)
• or if % of current HP fails, maybe some flat amount? Or hybrid between fixed & % of current hp? That could help in in lane while not making him into total unkillable monster

That also would work with undead warrior theme.

Reason why i believe HP > Mana for casting spells as sion is: he has terrible mana regen. He's almost dry after using his 3 skills at once. Also he gains health passively, so it could be used.

What'cha think?