Mighty Flamestrike of Assault vs. Clever Flamestrike of Force

[East2West]

Which one?

My stats are:

(lvl 15)
77 Strength - 870 hp

158 Int - 1730 Mana

Damage - 96.6

Armor - 397


The mighty flamestrike gives me 100 hp, and 30+ dmg, however it decreases my mana by 200, so in total 1530 mana.

The clever flamestrike takes away 50 hp, and gives 27+ dmg, and no mana loss.

Please help me make a decision, thanks!

p.s I'm a Fireball (3), Galeforce (3), Timeshift (4), Heal (4) build, meaning I'm an aoe supporter.