I have access to a gym again after being gym-homeless for about a month and a half. I have been working out at home using
bodyweight exercises and resistance bands, but boy did I miss gym equipment.

(And, I woke up excited this morning about getting to workout in a gym.... so sad.)
I'm going to work out today and "play" - just to check out the equipment but I'm wanting to formulate a program to start next week and I'm not sure what approach I want to take.
I'm 29, female, and pretty strong. I can leg press about 300 and bench about 115. I am a pretty muscular person and would like to lose additional fat, but my body has been pretty resistant to losing any more weight than I already have so I'm generally happy to stay where I'm at. I suppose my goals at this point are just to get stronger and lose additional bodyfat, if possible. (Yes, my diet is very clean.)
I used do a total body
strength training program 2x a week - 2 sets with 10-12 reps. Then I switched to a 3 day split and did 3 exercises per body part, 3 sets with 10-12 reps.
I read something recently that advocated doing 4-5 sets of 3-5 reps because this type of lifting taxes the muscles in completely different ways.
Thoughts? Suggestions?