They should all do fine. It’s not that cold right now and by the time they outgrow it, they probably won’t even need it. I think the most I had under there was 18 but they were never all under at the same time anyway except at night, and even then at just a couple of weeks old they spent a lot of time on top or alongside it.
We don’t worry about temps under MHP. 95 is probably too warm but you are measuring closer to the pad than I did the only time I measured it. I got 85.2 degrees in a 69 degree room and they were doing great. That seems to the average for everyone who had measured on the floor of the cave. Watch the chicks instead of the numbers and adjust accordingly. Too warm and they either won’t use it or hang at the front. Too chilly and they tend to huddle at the back. If they are running in and out, and loafing on top or beside it, it’s just right.
If I’m starting chicks outside, which is what I do, the setting will depend on the temperatures and number of chicks. Remember that cuddled up they throw off heat too. In temps in the twenties and lower, I start it on 5 or 6 and turn it down if I need to. They need a little more those first couple of days, especially in our cold springtimes here in Wyoming. Indoors you can start at 4 or 5 and change it if you need to.
Good luck with your hatch! We’ll need photos, of course!