One liner: enchant drills and similar such that the enchantment effect fades over time or over total # of block mined.
Multiple liner:
We want efficiency! We want fortune!
Can IC enable enchantment for tools? For balance, the enchantment effect needs to fade out after certain amount of time or after certain # of block has been mined (perhaps, with degrade)..
E.g.:
Fortune III, lasts 100 blocks. Degrades to Fortune II.. Fortune I.. and gone...