Focused Mage (4+ in any one magic school): +15% damage, +3 intelligence, +1 AP Recovery, +50% elemental resist of appropriate school or 50% piercing reflect for melee attacks for witches
Focused Warrior: (4+ in Man-At-Arms): +15% damage, +2 strength, +1 AP recovery, +20 armor
Focused Rogue (4+ Scoundrel): +15% damage, +2 dex, +1 AP recovery, +15% move speed
Focused Ranger (4+ Marksman): +15% damage, +1 dex, +1 perception, +1 AP Recovery, +25% poison resist
Telekinetic Warrior (2+ in telekinesis, no more than 1 in any other skill tree), +20% damage, +25% move speed, +2 AP recovery
Rainbow Wizard (2-3 point in all magic trees, including witchcraft): 25% resist to all schools except poison, 25% piercing reflect, +2 AP recovery
Swashbuckler (3+ in Man-at-Arms + Scoundrel, nothing else) +2 dex, +2 strength, +15% damage, +15% move speed boost, +1 AP recovery, and the special “quick hands” trait where equipping a weapon awards you +2 AP recovery/maximum for 2 turns. Let me know if there are any weapons that don't activate this that you think should, or if any other items activate the quick hands bonus that shouldn't.
Bounty Hunter (3+ in Scoundrel + Marksman, nothing else): +2 dex, +20% damage, +10% move speed boost, +4 AP Start, +2 AP maximum and also the quick hands trait, except it only applies to equipping a light weapon (that is, daggers, swords, bows, crossbows, wands, staves).