Summoning necro on hell?

[arrunique]

1. How to kill the first monster on hell (if 'personally', with what weapon etc.)

Depends on if you are pure summon or summon hybrid but in either case your act 2 merc with a half decent poking stick will do just fine in act 1 hell bagging your first body. Support him with decrep and it is candy. A cheezy way to do it is just run outside in act 5 and there are a few bodies lying around to get you started. Also you can enter anya's portal and skeleton up the bodies there, they don't mind.

2. Are skeletons and/or mages usable on hell?

Yes but they need support from your curses and an occasional body pop, and a might merc. With maxed mastery mages do decent damage but if you skip mages you can put the points towards bone spear so it just depends on your play style. Spear is a bit mana intensive and not super effective without high synergies. Personally I would only use it on a summoner if I had marrowwalks and could take advantage of the charges>synergies bug.

3. How is summoning necro performing agains PI monsters?

Decrep or amp damage nullify physical immune. Off the top of my head I can't think of a single monster they dont.

4. What act 2 merc aura is the best?

Might (offensive) is the best aura. It doubles your killing power. For higher end poking sticks look for arioch's needle because the + skills helps his might aura. Or doom if you are fabulously wealthy.

5. What golem is most usable on hell?

Clay golem is the best in hell. By the time you get there you should have a few skillers and the scaling life of clay will be higher than the rest. I forgot what the breakpoint is but I think with 1 point in each golem and 1 point in mastery at around +6 skills clay golem will have more life than fire. If you bother with revives you might as well put a point in fire just to help in nightmare but other than that you should think about skipping revive, iron, blood and fire golem and directing those points to either clay or summon resist.