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I Like the team . Haxorus DD will be better i think for this team with the support of your sweeper but with brick break over taunt for ferrothorn .
For Deoxis Superpower over ice beam for tyra or psycho boost for the power .
GG for the team ^^
I'd suggest Dragon dance or roost over Dragon tail on your mence .
Scald over water spout and toxic over WoW , scald is better if your opponent switch on a sweeper you can burn him and hurt him .
Heatran can be very dangerous for your team . I'd suggest HP ground over HP ice for volca .