How to Avoid Acolytes Being Killed on Secret Valley?

Level 30
Sep 2, 2007
How do the acos get in? You've only got 4 D;
I always used to upgrade one of those pyramidthingies (forgot their name)
to this icetower so the bm just gets slowed and creep in the meantime.
Sacrifice an acolyte. In the end, the BM doesn't get as much exp as you and needs to go heal, which slows his leveling down even more, if you sacrifice about 200 gold.