the abilities these monks learn are lethal techniques they utilize to carry out missions.

Piercing web

spend 2 ki points to create a web of razor sharp threads in a 20ft by 20ft enclosed area, all creatures within this area must succeed a Dex saving throw or be grappled taking 4d4 slashing damage every turn, on the creatures turn they must succeed a strength saving throw or stay grappled. This web also creates difficult terrain.

Doppelganger

spend 2 ki points to create a second version of you(does not have to be in combat) with his/her own initiative and half your HP. At a higher level you may spend more ki points to make more doppelgangers. Each doppelganger has half as much HP as the last. If you are in different places you are able to see and hear everything that you doppelgangers see and hear. The doppelgangers last until they are destroyed, you hit 0 hit points or if you make a short or long rest.

Trained discipline

Gain resistance to all non magical damage.

Insta-kill

Spend 5 ki points to instantly kill any creature you crit with an attack that's under half their HP.