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In general, the team Is unbalanced, its got too many bug Pokemon therefore too many weakneses if the same sort.
If you are planning on going with doubles:
Remove scolipiede and bring something with helping hand,its the quick boost that M herracross needs instead of baton pass, which doesn't work well in doubles, preferably a support Pokemon. Out of the top of my head I reccomend meowstic ( I can give you a set if you want. Meowstic also has quick guard and can set up screens which also help the snorlax set up.
You could also go in a different direction and go semi trick room. For example change solipiede with a cresselia to dmset up TR, have some sort of fake out Pokemon like maybe harimaya (replases starmie). Then replace volcarona for something slower like Heatran.
Scizor does well overall although you should consider switching it with aegislash, it bulkier and gets the job done easily.