By Ice Golem as a recommendation, I believe people refer to the spell "Summon Golem", which summons an Ice Golem. Summon Demon is possibly even better, and will certainly be able to tank any caster in the game while you kill them (golems included). They don't do a lot of damage, but they sure can take a beating!
You can grab Summon Demon from any shrine to Beliar if you have 230 ancient knowledge (or around 230, it's been a while since I played it).
If you do not have enough ancient knowledge, you'll have to stick to the strategies already posted.