Uses devos, umbral, lash synergy. Start sunder for damage and prioritize since loki excels at farming. Get fire creeps on cooldown and save sunder for that unless you have a free kill. Late game full commit on the backline.
Pop your 2 on the enemy and group wave. Skip your 1 at lvl 3 and put a second point into your 2.
You can max your 3 first if the enemy can't cancel it.