I hate that BRD is so dependent on DRGs Buffs/Debuff

[Lastelli]

The slashing debuff is in the same boat, but there's less of a single dependency because NIN, SAM and WAR all provide it rather than only DRG, so there are far more comp options. And you always want NIN anyway.

You always want a DRG too, at least if we're talking about the optimal party composition. If not, any composition is perfectly fine.