Since it is possible to enter uw with 7 heroes, it is pretty easy to just rush to chaos planes. So my thought is, that you only need to worry about how to kill those mindblades as fast as possible...just use your heroes to get there and flag them away.
First you need some kind of skill protection like shadow form...but after various nerfs there a dmg cap...you can only deal 26dmg on 16. There must be a better option like...[[Vow of Silence]] or [[Obsidian Flesh]] maybe [[Spellbreaker]] too. Than you need protection against [[Signet of Disruption]] like [[Signet of Mystic Speed]], [[Pious Concentration]] and [[Mantra of Resolve]]. Now you need dmg and defense...
Any thoughts about a build? Or is [[Shadow Form]] still the best anti spell protection for farming?
I

/any_HM_Vaettir_Farmer