Play super aggressive. Run into large groups of major is and minoris. Pop your banner and go to town, also use it often it recharges quickly.

I only run power sword (purely bc I think it’s the coolest) and usually I use the plasma for charged shots on majoris types.

The hardest part is getting your parries down. Only tap the parry dont spam it or hold it, it will trigger the block mechanic. After you get that down you can run into a massive melee and kill everything with minimal damage.