[Trexmaster]

You're not wrong, Geldoren is literally the only fist-specific basic attack skill. Everything else is an auto hit.

Spamming autohits seems to be a niche fists got pushed into with how all of their promo class push using them, Boxer and Verglas benefiting greatly from using specifically their autohits to get more value out of them. Monk is the only one of the trio that retains its level of power while using any other classes abilities.

What little support basic attacks gets from the Martial Artist line can be summed up as about +20 hit from Martial Artist itself, +0-30 crit from Monk, +4-56 crit and hit from Boxer (Scharfe, it takes at least 12m to maximize the bonus assuming no evades or geist procs, and lasts 3 rounds), and +5-30 crit damage from Verglas (you also get +5-30 power but i'm talking benefits that work specifically for basic attacks).

You could argue Scharfe is a pretty potent buff but building all that schwarz is as Ruff stated going to bleed your FP dry if your opponent doesn't feed you it. Ultimately it isn't even enough to counteract someone using a spirited Disengage without Miragewalk (+60 evade) at max SS.

Having at least some synergy built into Boxer for basic attacking ala building schwarz with crits is a start--I'd also suggest it help boost your damage with fist basic attacks as well with a similar modifiers to boxer skills (5% per schwarz). This combined with FP generation on basic hitting would allow a Boxer to sustain themselves while being built to basic attack rather than tanking up and have a massive pool of FP with the regen needed to carry through the fight.

As it stands a Boxer trying to focus on basic attacks is dead in the water compared to one who simply embraces the auto-hit spam that the class is centered around.

To put it into perspective, a basic-hitting Boxer is looking at building at least STR SKI and LUC. An auto-hitting Boxer only cares about STR from that list. Then you start looking at defensive and utility stats you need, WIL VIT DEF RES, potentially SAN depending on your race. Shorting yourself on any of these leaves a gaping hole in your defenses or in WIL's case puts a very short clock on how long your FP will last until you're forced into nothing but your basic attack.

To quickly wrap up:
Suggestion One: As I stated, this would be a great addition to encourage playing a Boxer who aims for crits, even if fist weapons in their current state don't offer much variety for weapons that enable this.

Suggestion Two: Any kind of FP gain on basic hit would be nice to supplement a basic-oriented Boxer who manages to live long enough to bleed their FP. It could even scale with your schwarz to further reward critting combined with the first suggestion (or just using your boxer autos to speed up the process).

Suggestion Three: Boxer could afford to be less stringent with what skills they're allowed to use from their own base class. A nice compromise could be reducing the penalty to 1 schwarz lost from 2 if it's from MA.

BONUS SUGGESTION: It might be neat if Boxer had a skill that let you choose to augment your fist basic attacks rather than Boxer auto-hits, somewhat in line with my suggestion to just give this bonus to basic attacks.