Please help me with my summoner build

I am new to summoner build and i am having several problem choosing aura, curse and building my minion.
1/ How to get a 11 k hp minion? I have a level 16 zombie gem + minion hp nodes and gem and it only have 3k hp
2/What curse should i use? Enfeeble, temporal chain or vulnerability ?
3/ I can currently run 4 aura? What should i choose from these : Vitality,purity, clarity, discipline, hatred
4/What is the best supp for zombie and skeleton? I feel that my minions are very weak and their dps is very low
My current set up:
Zombie: mele splash + minion life + minion damage + concentrated effect (rime gaze)
Skeleton: totem + minion life + add chaso damage
5/ How can i solo boss? many guides say that summoner excel at end game but i feel that i am weak compare to other builds. I am having trouble with piety ( crematorium) even with 50 lightning res + purity. My minions die in 2 seconds before i can do anything.

Thank you very much for helping me.

Minions scale VERY heavily with levels, which is why they shine so much more endgame than the early-mid levels.

Just as an example, putting my zombies in a +2 minion helm was a boost of nearly 1k life with no minion life from gear or support gem. Right now they are sitting at ~4350 life at level 18+2, which is at least enough for level 66-71 maps, some bosses beyond that are pretty sketchy for me.

11k is very high though, do not expect to get that much without some pricey uniques.

I would highly recommend running dual curses. I usually run vulnerability+enfeeble, or vuln+ele weakness for easier content. Also leveling temp chains with the intention of using it with eleweakness to permafreeze mobs, but haven't tried it yet. Enfeeble+temp chains could be used for a very defensive setup. Warlords mark is also something to look into.

It would help if you linked your passive skill tree, but I am currently running the first 4 auras you listed with eldritch battery: vitality > purity > discipline > reduced mana, and then I have clarity+arctic armor unsupported on my shield, leveled as far as i can get them. Hatred would be a huge damage boost for zombies, and I would recommend it over discipline if you don't need the extra es/mana and your zombies are tanky enough for the content you're running.

Bosses need to be outgeared and outleveled pretty much, heavy aoe damage is the builds greatest weakness. I support my minions with necromantic aegis, my auras+curses, rejuvination totem, and flasks of animation very important for the build.

My links:

not sure if lifeleech is the best 4th link for burning miscreations as I believe it only effects their melee swings, but this setup has been working out nicely for me. Optimal 6l would probably be Spectre > Inc Burning > Minion Damage > Minion Life > Inc. AoE > Conc. Effect.

Besides BMs, another really good spectre you could use are the undying evangelists from scepter of god (the ones with proximity shield) as they give your minions a huge survivability boost while they are in the shield radius, while also dealing good damage and staying safe themselves.

Also I do not use skeletons simply because I don't have the sockets for them and don't find them all that useful, but i do have summon skele+ spell totem leveled just in case.