with forretress i was using the dual screening thing really as filler, but turns out its been helping me alot, but i will mostlikely give it rapid spin, because hazards mess with this team too much
for the 2 mew sets, well the second is obivously sweeper mew. the first, while having good hp, wouldnt have the bulk to survive a hit from something insane like +3 bullet punch from scizor. ill try them out again, but im also messing with the EVs for its current set.
as for haxorous, well ive always hated outrage, for 2 reasons.
1- it confuses you after usage. 2- i never hit through confusion.
and shadow claw = filler, but outrage = no no. im thinking of some replacements. but youre right, i should add more hp to increase survival.
If you really don't like the confusion that Outrage induces, then use a Lum Berry. It really, really helps. You can also have both Outrage and Dragon Claw together on the same set; the former can be used for tearing massive holes into the opponent's HP while the latter can be used as a safe, reliable STAB when you feel that the power of Outrage would be overkill against frailer Pokemon. Dragon and Ground have good coverage together, but that still leaves you a bit vulnerable to Ferrothorn, as explained below.