| You can also consider summoning monsters during timestop. Look out for those with a ton of SLAs usable at-will to spam. Bone devils (SM7) can be pretty obscene. With SM9, you can summon 1d4+1 of them, and have them all spam wall of ice every round to clog up the battlefield.
A colossal centipede is not a bad idea for grappling the spellcaster (assuming there is sufficient room in your lair and the wizard does not already have freedom of movement).
Elementals appear to have the most hp (if you need meatshields). This should help take the heat off you and give you sufficient breathing room to cast your other key spells. | 
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