Both finger and endless can do swing (green knob; including <50% swing, not typical for MPCs)
Best really just to play around with the different sequencers and see what works where. Endless is good for extended patterns and toying with scale divisions, but you have one shot to program your whole pattern. Finger is more limited in length and scale (and can only do 2 notes per step, vs endless 4), but you can re-edit patterns step by step, store multiple patterns, and layer two patterns at once.
If you really want quintuplets or septuplets, here’s a goofy trick (more as an example of just exploring the device to see what works): change your tempo to a ratio of the original (set your bar/loop points at the original tempo), e.g. 100BPM * 7/4 = 175BPM. Now sixteenth notes on a sequencer will be septuplets relative to what you originally have on the tape. Then you can meticulously program in whatever wonky tuplet rhythms you want
(I used this recently on a sketch in 5/8 meter. Record sequences at this altered tempo, then switch back to the “normal” tempo to get sensible bar lines back for tape arrangement)