Cleon
Legend
I like the idea of rapier/dagger as two weapon-attack (1 each + bonus dagger)
So you mean:
Multiattack. The thrall makes two melee attacks: one with its rapier and one with its dagger.
Bonus Actions
Stab. The thrall makes one melee attack with its dagger.
Bonus Actions
Stab. The thrall makes one melee attack with its dagger.
Alternatively, we could keep closer to the original design and let the Thrall mix-and-match its Multiattack however it likes, we could jazz it up even further by letting it make a ranged attack as a Bonus Action as well as a melee attack.
e.g.:
Multiattack. The thrall makes two attacks. It can use its rapier or a dagger for either attack.
Bonus Actions
Lethal Legerdemain. The thrall makes one melee or ranged attack with a dagger.
Bonus Actions
Lethal Legerdemain. The thrall makes one melee or ranged attack with a dagger.