hey mate
might be a bit late now but..
here is a link to a really good build for hench/hero vanquishing...
http://www.pvxwiki.com/wiki/Build:Team_-_Triple_Necro_Vanquish
Use that build with those heros and take any dps build of your own
In zones with a maximum party capacity of 4, just you and those heros is fine
If it is 6, take 1 Healer Hench and either a Fire Ele Hench or a Warrior Hench
If it is 8, take 2 Monk hench, a Fire Ele Hench and a Warrior Hench
As far as I know it can vanquish every zone in all 4 campaigns.
Happy VQing