Gundark
Explorer
In my game when the players confront the "End Boss" he/she/group/monster is usually at an EL that is higher than the group. I usually aim for an EL that is usually 3 above the party level. I have been finding lately that this isn't enough (4 players levels 8-9). What is the EL difference for your "End Bosses" (doesn't have to be one guy/creature, it could be many)? Does that gap stay the same as your PCs progress? Let me know.