I would compare this cost to that of beacon sneaking.
Beacon sneaking swaps with the beacon for a benefit to the cra: 2ap 1 wp + 2ap beacon cost
Mine tunnel teleports the enu and sets up a gold mine to benefit the enu: 2ap + 1mp +1mp mine mover cost
Because of that I would probably see it having a minimum 3ap cost with some sort of wp cost on top of that and probably a few less range because its no-los.
Enutrofs dont have a bunch of states but maybe something like "+x% chance to apply broke", certainly some sort of general damage, resist, shield buff could be applied (increase the strength by the level of the spell) to incentivise leveling it.
Maybe toy around with the idea of using this in drhellzerker mode vs human mode aswell
Escape is something enutrofs are definitely lacking so Im sure a teleport would be warmly welcomed