Honestly I wouldn’t load your 4th year with psych electives 1-2 is plenty. I did a sub-I/AI at a state hospital and CD elective that I switched to from an ICU elective less than a week prior to the rotation just because it would be more flexible with scheduling residency interviews (it actually turned out to be an awesome rotation and am really glad I made the switch). I’d recommend a IM sub-I/AI, possibly a neuro elective, and then just do stuff that seems fun/interesting or are in areas where you really won’t get to experience after you start residency (e.g., surg, gas, IR, etc.).