Hearthpwn

It is :) That's the reason you would need to duplicate 1 innervate to cast it three times to reach 4 mana :). 

Edit: in standard, assuming only 1 proc on florist. 

Most damage, assuming that florist hit Malygos:

Hand: Elise, Maly, Moonfire x2, Innervate x2, Floop. 

(mana left) cast:

(10) Elise (5) Maly (3) Maly (1) Innervate x3 (4) Floop (0) 4 x Moonfire.

Total of 3 malygos and 4 Moonfire for 64 damage.