well, i'm impressd w/ your attempt at having an awake bless
Dom 5 is extremely marginal, though. your own scales won't cover your territory, and you'll be vulnerable to a dom push. I'd suggest making him asleep, bumping up dom to 7 and magic to 1, if you can squeeze the points.
and Iron will is very difficult to use - you really need an s3 caster putting up Antimagic. to use Iron will you'ld need one earth mage for each 3 spiders...
w/ the same scales, but Magic1 and dom7, you can try an asleep glyth S9F9... there's something to be said to having an astral king
and F9 will give them pretty well the same punching power against indies, and also against etherealized units.