You can't even weapon swap in/out of TBS. It's the ONLY set that loses its bonus due to a weapon swap. If they can remember the order in which buffs were applied when removing TBS, why can't they remember that the buffs WERE applied when re-equipping it? I thought I had a wonderful setup:
4 armor + regen staff: Mundus (with second buff being The Ritual for healing)
3 armor + DW swords: Vicious death
Swap between offense and healing, right? Wrong because any swap loses me the second Mundus buff until I go get it again. Makes the set worthless to me.