I don't think it's the strongest no, but it's handy I suppose.
I posit you don't have any insanely strong master spells in your arsenal?
Sure, master spells damage are insane - well, at this level
they are the only one that really count for damage purposes since basic enemies have 1750hp they don't really care about fireballs doing maximum 260 damage.
The only thing you can trust for damage in this game is weapons... they always works. You can't rely on one spell to do damage since many enemies have 50-70% resist, and a lot have more than 100% meaning they will be healed.
Last major fight I cast Earthquake, too late did I remember that they have 150% Earth resistance... my bad. Healed everyone except me on the battle field.
Really, magic is about CC and environemental effects like slipping, burning, stunning etc. only master spells really do damage. Weapons are about damage, they do the job.
By my experience, it's an equation that changes through the game : when u begin magic is really overpowered and weapon are meaningless, when you reach level 13-15 the equation changes, spell damage becomes somewhat irrelevant (except for master spells) and weapon damage breaks the roof.
I've seen undead walk through 15m of fire and take, like, 5-10% of his lifebar off. But hey, some of them just took nothing at all...
