| Qzzrbl |
Soldier gets 3 attacks at Lv11
Solarian gets 3 attacks at Lv13
Operative gets 4 attacks at Lv13
If you're going full unarmed, you can snag Weapon Focus (Basic Melee) for a +1 to attack rolls.
idk what books you're using, but if you've got AA4 you can slap natural weapons on anything as a graft augment
ring of fangs is worth looking into
If you're an Operative and not opposed to using weapons, polarity gauntlets are bonkers big-boy damage if you've got advanced weapon proficiency and can manage to land all 4 hits on a target.
There is also the Multi-Weapon Fighting feat, which will drop the full attack penalty to -3 instead of -4 but you'll have to find a way to make unarmed strikes into operative weapons. I don't find it to be worth it damage-wise tho.
Photoenergetic node is another fun augment, if your gm isn't a pedant and doesn't mind considering unarmed strikes to be "held weapons". Super cheap for what it is, too.
Dipping a level into mystic for the sole purpose of grabbing the wrecking fists epiphany is fun, and it gives you improved unarmed strikes for free and removes the archaic property from your punchies.
Nothing feels quite like kaio-ken as activating photoenergetic node and burning a spell slot for an extra 3d6 during a tough fight.
Though wrecking fists/ring of fangs bites will out-damage it after a few levels.