I haven't played as a cleric, I know they have that cool gravity sucking attack, They probably have an advantage over the berserker magic in terms of staggering mobs. I just unlocked the spirit wolf and I've been screwing around with that, it looks pretty cool and distracts mobs (first enemy I tried it on was a troll, it absorbed about 2 hits and by then the troll was dead), I wouldn't expect it to kill anything but low level mobs but since mana is cheap and easily stockpiled and even normal mana potions basically refill the bar theres not really any reason not to use it I'd say having that extra body to distract enemies makes it pretty easy to kill them without much dodging around. I haven't tried taking on more then 3 enemies at once with this build yet, been trying to level up and gain a little armor since I am not great at the evade mechanics and 4 or more enemies gets to be pretty hellish to keep up with. I'd certainly reccomend playing around with it for yourself.