Combine force bolts and digging beams. Specifically:

• Remove the wand of striking and the spell of force bolt.
• Roles that start with force bolt instead start with magic missile and at least 10 maximum Pw.
• All current environment interactions of force bolts (breaking boulders and statues, crashing open doors, etc) are moved to digging beams.
• Make digging beams affect monsters, with a guaranteed hit and fixed 6d12 damage from the spell (since it would be level 5), less damage from a digging wand.

Zapping a digging ray upward may either detach a boulder from the ceiling, or several rocks, instead of a single rock. If several rocks are released, each gets a separate damage roll.