Summary
There are two separate damage caps in PvP; Melee and Spellcasting:
Supplemental Skills
Supplemental Damage skills provide 10% * (skill / 100) damage bonus in PvP
- Blacksmithy (metal weapons only)
- Camping
- Carpentry (wooden weapons only)
- Cartography
- Chivalry
- Fishing (spears only)
- Focus
- Forensic Evaluation
- Inscription (only martial manuals or magery, when casting from a scroll)
- Item Identification
- Lumberjacking (axes only)
- Mining (maces only)
- Necromancy
- Tracking
- Secondary Weapon Skills
- Archery
- Fencing
- Mace Fighting
- Swordsmanship