you will probably be fine with the t case drop.
the MML is normally what is used with body lifts to keep the fan lined up with the fan shroud. it can be used in place of a t case drop, but you will need a body lift or have to modify your fan shroud if you get a motor mount lift and dont have a bl.
now every jeep is different, so even with a t case drop or a MML, you may still have vibes and need a SYE.
you could awlays just take the 3/4 inch spacers off the rear. this would give you a more level stance, and make the drive line angle in the rear a bit better if you do experience vibes with the t case drop.