I'm just playing a high-level Fishy and I have 'Beast' on main and 'CtA' on the switch. I love it. CtA is a decent summoning weapon. You're trading 2 skill points in the skellies for a lot of life for the entire party (vs. Arm of King Leoric). On the other hand, 'Beast' helps the moron kill quite a bit (attack speed + AR), as well as helps a lot with AR of the skellies, which is pretty low in Hell.
Iron Golem I recommend 'Insight'. High level CE can be a mana hog.