I have a party of 4 freshly minted level 7s for an upcoming game. 3 of the players have been playing for a while and one person is a relative newcomer to the group.
The problem I'm having is that 2 of the regular players tend to min/max quite a bit, and while I don't think that's a particularly bad thing I don't want combats to be completely walked over. Looking at the only two character sheets I have at the moment I can see that they will be hitting the majority of my encounters with a roll of 3+ at worst.
Now I know I can easily up the armor of my encounters to compensate but I don't think that is the best solution, nor would just making the enemies walking bags of HP. I don't want these encounters to be a cakewalk where they are hitting all the time but I also don't want to make it seem like the players that aren't min/maxing are completely useless and only hit on a 19 or 20.
How can I balance my combat encounters both for the min/maxers and the other player characters?