Cap'n Kobold
Hero
Sorry. I think I missed out explaining the reasoning.No. It is not. There is no reason to assume a battlemaster has even chosen those manoeuvres. The floor is 0.
Can we agree that maneuvers are roughly balanced with each other in terms of tactical impact on the game? Sometimes the extra damage from giving Commander's strike to the Rogue will be better, sometimes granting them advantage will be better, sometimes using a maneuver to reduce damage will be what the situation needs, but they are all roughly the same effectiveness when used by a character built for them in the right situation.
Does that seem reasonable?
Now we can't model the tactical impact of knocking that dragon out of the sky, or disarming that orc champion, or getting the wizard out of melee or a grapple. But if we're just comparing damage between subclasses, we can model spending the Superiority dice on pure damage dealing. - With the earlier assumption that a tactically-inclined BM player will get equivalent use out of whichever maneuvers they actually have.
Not going overboard here: we're not basing this on an optimised BM with feat synergy any more than we're using an optimised Champion as that baseline. We're not taking into account the advantages of on-demand nova extra damage as opposed to random or other benefits: we're just calculating todal damage done per day rather than more tactical application of the extra damage.
NotAYakk gave a run-down of the damage output for this base-level Battlemaster, to use as a more accurate yardstick to balance the Champion.