Damn, that's a nasty looking list....
I'm not sure I like the synergy of the lootas and the wagon though. The Deffrolla is great, but if there's lootas in it, you probably want it more in the back of the field.
Try instead:
12 Lootas-2 meks-180
Battlewagon-Killkannon, Grot Riggers, 3x big shootas, Kannon-180
Yeah you only have 10 lootas now... but you have a lot more dakka if you hang back, as they dont have to snapfire. you also have meks to repair the wagon, as well as an AP3 pie plate and a kannon
Automatically Appended Next Post: also you can take a grot off one of those squads and get a 4th big shoota on the wagon.