Ohhh Im glad u ask this, because avenger are not that popular but if u like to laugh at monster dying in one hit or 2 in hell go for it. Also Avengers are a great support character in hell to caster and even for melee.
STATS
Str : enough to equip your gear and weapon if 2handed(in my case i use Levi plate-174 str-)
Dex: enough to max block(U MUST since they attack slower them a zealer, 125 is a good choice)
Vit: ALL HERE
Energy: absolutly none, none at all , nada ok ok u got it
SKILLS
U got 2 choice here but i prefer the first one cuz u get more damage from vengeance skill.
20 Vengeance
10 fire resist
10 cold resist
10 lightning resist
20 conviction
20 holy shield
1 in all defensive aura
the rest of skills u can lvl up defiance for more def or salvation aura cuz ubers are very popular these days
The build can be finish around lvl 80-85
EQUIPMENTS
Helm : Gaze(Um or 15 all resist jewel), tal helm
Armor : Leviathan plate (Um or 15 all resist jewel)
Shield : Herald of Zakarum(Um or shael if u want to block faster)
Weapon : Ill come back later for weapon****
Ring1 : Raven frost
Ring2 : angelic ring
ammy : angelic ammy, Cat eye's ammy(for more speed)
belt : Perfect String of ears(in my case),nosferatus coil, wilhelm(double leech own!), verdungo
glove : lavagout(my favorite),soul drainer, dracul,laying of hands(good one against demon)
boots : Ik boots , aldurs boots, gore rider(especialy the best boots for any melee)
WEAPON CHOICE!!!
Allright!! Here we go. An avenger can pwn with every exceptional or elite weapon that have elemental damage on it. For example with a Nord's mace u can pump your damage to 3.5k - 3.6k damage on one handed without conviction aura using vengeance. mean with aura lvl 25(AND I NEED TO SAY THE AURA WONT GO FURTHER THEM LVL 25, CUZ WE GET MAX LOWER RESIST AND LOWER DEFENCE AT this LVL) -150% on all resist and -95%def, u can double and near triple your damage to 7k-8k ez.
this is the damage without conviction aura
Baranar - 3k
NOrd - 3.6k
Azure wrath - didn't tested yet but its around 5k - 6k for sure
Djinn Slayer - didn't tested also but around 4k - 5k maybe(the sword ill use cuz it got 2 socket mean i can have more speed atk)
Light saber - havent tested
Messerschmidt's Reaver - 6.2k(2handed axe)
Here some other weapon with elemental damage on it
Flamebellow
Frostwind
Astreon's Iron Ward
Demon Limb (3.2k-3.4k)
Stormlash
=-RUNEWORD-=
Famine in Ogre Maul - 6.5k-7k(2handed)
CrescentMoon in phase blade(Sheal Um Tir) - 2.5k-3k(maybe the best weapon choice cuz its lower lightning resist and ignore target)
WIth these weapons u can reach around 9k and 16k damage with conviction aura.
TIPS
1. Remember its a Support player and dont suicide yourself when there to much monsters, always check the situation if u can take them all.
2. When your Lvling always max conviction aura first, its help for baals runs, its aid others players and yourself for nightmare if someone is not rushing u.
3. Get the more Increase Attack Speed u can cuz vengeance is a bit slow as an attack.
4. Get Around 200 mana with charms.
5. Use redemption, meditation or zeal or with mana leech OR mana pots to recover mana. Everyone saying bahhhh they need soo much mana for vengeance. The fact is they kill in one blow or 2 with good equipment.
6. U can do all hell if u want with this char if u go carefully.
7. Leviathan plate, string and gaze give 50% damage reduction soo its a good choice but u can get another different gear if u want.
8. Ok i repeat u need IAS LOAD OF IAS, fervor jewel, ed/ias jewel ,shael help. IF u thing u got enough resist for hell them get more ias.
9. GO KICK ASS!!!!
Have fun :hxc