Few questions about poison necro, lower resist vs amp dmg, caps etc.

[Fitsu]

all synergies and maelstrom
1 pt amp dmg, lower res
1 pt to summon spells may help aswell
max golem mastery then remaining to clay golem, they are the only relevant golems
plaguebringer / true guise / kaalut / trag belt / trag shield / trag gloves / x2 carrions / atma or mara / Lk boots
get some psn facets
just run into stuff, cast maelstrom, die and rinse and repeat. you'll kill anything

But if i'm gonna be using true guise then i'll be using fire golem right? What makes Clay golem better?