Chaosummoner
It's a basic summoner but he can handle Chaos sanc without worries for your Merc

(I love it)
I didn't see any guides like thins on the first few pages (or in the stickied)
so I geussed why not
anyway we will hit the skill lay out first:
Summon
Raise Skeleton: 20 (duh)
Skeleton Mastery: 20 (again duh)
Clay golem: 1
Golem Mastery: 20
Blood golem: 1
SKeleton Mages: 1
Summon Resist: 1
Iron Golem: 20
Revives: 1
total: 85 skills
Curses
Amplify: 1
Waken: 1
Terror: 1
Decrify: 1
total: 4
B&P
Teeth: 1
Corpse Explosion: 20 (max last)
total: 21
build total: 110 >.>
max CE last but put a point in it ASAP
now Gear:
Head: 3/20/2 or a 2nec/20/2 ~ just make sure you got 20FCR
Weapon: Hoto
Armor: Enigma
Shield: homuculus/ Dark spawn* both Um'd/Pdiamond for Res
Belt: Arachnid
Gloves: Trang gloves
Amu: try for a 15% FCR +Necro skills/Maras*
ring:Soj
Ring:10FCR/Soj*
this will hit 125FCR, with DarkSpawn you can use Maras and a Soj but you can't go max block
it's eithe choice of wealth or preference
I prefer the Homu way since I like to tele on to some creatures giving them a shot at me so I get mb to prevent dying from that
your choice tho
since this is a PvM build a Merc is needed right
well we use an
Act 1 Fire Arrow merc (because Ice Arrow sucks

)
Weapon: Faith: Try and get and 15 Fanat Faith
Armor: 160/60 or Fort depends on wealth
Helm: 120/45 or Vamp Gaze again depends on wealth
this does not only boost your minions with a nice Aura but it is also a nice dmg dealling merc, since an A2 merc can die because of IM, this one won't
now I max
Iron golem and Golem Mastery for one thing
Insight Voulge Golem,
that's right, with GM and IG maxed this baby will get more life then you do

(alot more)
we use voulge because he's just here for Med. aura and he can die if IM'd
now inventory:
Necro Torch
Anni
3 summon GC's
(maybe some Res sc if you didn't max it)
I prefer not to use 9 GC's because what's the point of doing Chaos runs if you can't pick anything up
the Max block set will give you
Mana cost: 43
Number of skeletons: 14
Damage: 534 - 538 (ø536)
Attack Rating: 1143
Defense: 1145
Hit Points: 6012
Resist lightning/cold/fire: 65%
and
Mana cost: 35
Damage: 7 - 19 (ø13)
Attack Rating: 1050
Defense: 1470
Hit Points: 2646
Resist lightning: 115%
Resist poison: 165%
Resist fire: 65%
Resist cold: 65%
Damage returned: 705%
and the non mb:
Mana cost: 45
Number of skeletons: 15
Damage: 599 - 603 (ø601)
Attack Rating: 1203
Defense: 1205
Hit Points: 6649
Resist lightning/cold/fire: 67%
and
Mana cost: 35
Damage: 7 - 19 (ø13)
Attack Rating: 1100
Defense: 1540
Hit Points: 2769
Resist lightning: 117%
Resist poison: 167%
Resist fire: 67%
Resist cold: 67%
Damage returned: 735%