I did try to dispel the nexus twice, the most recent attempt I used 130 astral gems and failed. With Kailasa's gem income, even if I could dispel it it no doubt would have went back up in no time. There was little point in trying again so I didn't.
Spells like disintegrate (mr check) would have to be spammed like mad to penetrate the mr of the rudras and the seraphs. Ghost rider spamming worked well against the rudra's, but there are too many Seraphs, and I've had no luck taking them down.
This turn it looks like I've lost half of my total army, my cap will be captured within a couple of turns. Too little, too late, did I commence hostilities against Kailasa (I actually didn't realize he had the nexus up, until I chatted with Niefel).
Without question Kailasa has won.
Bon jeux Yandav!