Best Solo Caster Class is toss up between Mage or Necro... at least in ability to solo and overall survivabilty. Now as for AA;s for a SK.... same as a warrior.. ide go with CA/CS max as soon as you can for level.. plus some kind of DPS AA's..... but those I do not know.
Combat Agility and Combat Stability under General tab. Every tank should keep those maxed as they level. https://forums.station.sony.com/eq/...-how-much-is-good-for-each-lvl.550/#post-5623 is a good thread for the core AAs for all classes to get. Yther Ore.