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Change icicle crash on mamo to endeavor and make him jolly. Endeavor brings them down to 1 hp and ice shard has priority. Jolly is for the faster rocks. Also use oblivious on mamo so he can't get taunted.
My Team
Teambuilding process
I wanted to make a team with a really good hazard setter but i didn't want to use Deoxys-S because I thought it was too frail and suicide leads aren't my thing. I decided to use Deoxys-D. He is really bulky and gets up a lot of hazards before I have to switch...
I suggest that you use latios over latias to fit the role of an offensive defogger better than latias. With the evs and moves that you have, I think that is the role that you want.