five magicks (and possibly dragonbreath) would fit the radiation theme
#Tzen Tar Radiation
urban wyvern
unfortunately, not everything that deals radiation damage deals enough damage to be worthwhile.
would probably drop the Exploiter first since you're nowhere near overcritting.
torp point defense is always a fun one to run on torp builds
urban wyvern
if you're interested you can always just parse any regular thing you do, your crit isn't super dps dependent. with about 60% crit chance standing and +15% from TG and up to +10% from UD, you should be between 80% and 85% effective crit in combat. which is a respectable number, but Exploiters only become worthwhile at pretty much 100% crit chance.
lime ivy
If you need more inspiration, you can use VGER to search for "radiation" if you hit enter on the search, you get a list.