I think AN/CP/IS are the only things that should be obtainable through EXP once capped. In order to do so tho you MUST be capped on EXP and LIMIT POINTS. I believe a fair conversion rate could be for every 1000 exp you get 10 points. Either through Void Watch or Conquest or Sigil or Sanction areas. Abyssea should never count as you already get cruor. The conversion rate don't seem like much but add that to what you usually get and with level sync and you could still pull a decent amount, and honestly anything is better than nothing.