1-forma combo build - starts out weak but rapidly gets stronger. There's certainly better weapons to do this on, but it only costs 1 forma on the [Kronen Prime]. Replace Quickening with Gladiator Rush if you're not using the Naramon school.

The best riven stats to improve this build are crit damage, attack speed, and I guess combo duration so you don't have to replace anything important (assuming that's a stat that can show up on melee rivens, idk).

Enjoy.