Playing it:

Easily the most broken mech in HS and undefeatable if you use it properly including Charge rockets with double speed boosts. About 70 matches died once to Outlaw CRs.

Against it:

Honestly fairly simple. Take as little damage as possible when they're active and abuse their cooldown by chasing and killing them, the exact same as Eclipse/Redeemer. Since they need to do as much damage as possible in miliseconds before being invulnerable, their only viable options are again CR, SR and BB which two were nerfed and one is easily counterable with CB.

The hardest part imo isn't the mech at all but the timing. does their teammate have LOS, can you maneuver around a volley of rockets/laser beam and can you chase them across the map safely. If you can answer all three you're guarenteed a kill but if even one can't be answered, you're dead.

Other gamemmodes:

Near undefeatable in non modded lobbies with a group of friendlies for cover but will struggle significantly in endgame since its too weak. Your best bet is finishing kills or 1v1s with compound beams and thats even if they don't have good abilities which you end up using yours and wasting time.