attempt 1: using an instant teleport dupe and BSMOD killmoves to take them out.
Result: almost successful, got away before killmove could finish.

attempt 2: same thing
Result: teleport failed, got stuck in a wall and they proceeded to escape.

attempt 3: getting npc's to attack the kleiner
result: cannot deal damage to them.

attempt 4: trying to ent_remove kleiner.
result: does not register as a npc_kleiner due to way the map works.

attempt 5: same thing as above but directly aiming at kleiner.
result: probably broke some map elements along with removing the trigger.

more coming soon.