usually, u'll be attemtping to burn most of the types out there including Flying, Poison, & Steel types bar Fire and status absorbing Fighting types(considering they play predict and switch for a Flash Fire/Guts boost), so Toxic Spikes support is the less profitable option. An Amoonguss with Venoshock in Trick Room support (easily viable due to Rage Powder) is more suitable for Toxic Spikes. Evil Eye (English - Hex) is awesome because Cofagrigus has Will-O-Wisp, as its teammates should have moves for other status (Sleep, Paralysis, etc.) if Cofagrigus cant burn its target.It works, if you pair it up with a teammate that has Toxic Spikes, you could use Evil Eye and dish out even more damage. Considering all of the Flying, Steel and Poison types, Shadow Ball is still more reliable.
everyone has to be careful w Mummy, because if your attacks require contact (Bullet Punch, Mach Punch, Aqua Jet, Waterfall, Crunch, Brave Bird, Megahorn, Flare Blitz, Return, Power Whip, the 3 Fangs, the 3 Punches, Wild Charge, and others) ull lose ur precious ability that mightve helped u pull off a sweep.