FBs don't have to, since they can buff with a blade/kat alone, so if they replace leg weap with blade/kat, it's fine.
FS do have to, since if they remove either weapon, their astral shield disappears. War doesn't like FS or BL =P
Just go aura and combo instead of BM2 if you don't wanna take off buffs.
WAs dont have that problem. even with other peoples' buffs, i jus right click and POOF ~~> PRO
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