I love playing 1v1, and I'd like to build a team around Magnezone. I'm looking for a couple of fast, hard hitting pokemon that can cover the 1v1 threats 'Zone can't. Here's the set I'm using:

Swagnezone (Magnezone) @ Custap Berry
Ability: Sturdy
EVs: 128 HP / 112 Def / 252 SpA / 16 Spe
Modest Nature
IVs: 0 Atk
- Thunderbolt
- Flash Cannon
- Hyper Beam/Substitute
- Endure

Specs Magnezone might do more damage, but with base 60 speed you usually only get to use one move per battle. I really like Sturdy Custap, since two moves are better than one and priority is always nice. I've tried speedy Magnezone to some success, but I really like these EVs since they let me survive two Sucker Punches from Mega Mawile 100% of the time. The 16 remaining IVs are just dumped into speed but maybe I should put them into special defense instead. Tbolt is 100% accurate primary STAB, it hits lots of things for neutral or SE damage. Flash Cannon is a secondary STAB for Fairies, Rocks, and Ice types. I used to run HP Fire but never used it, so I'm switching it to Hyper Beam for CharX. Substitute might work too if I change the EVs to max out speed, to get past slow statuses, Mirror Coats, and Sucker Punches. Endure is to tank a hit and be able to use a custap-enabled priority move the next turn.

Is there a better set I could be using? What are the ideal team members for Magnezone, and what threats do they beat? Any input is appreciated!