With EoK you are limited to TDS expansion powersources, all dropped from named
Good news: Specific types of powersources drops in different zones
Bad news: You need TDS progression to get to the specific zones
Combine Power Shard - Casters - Degmar
Geomantic Steelstone - Tank - Combine Dredge
Ocean Purification Stone - Healer - Caverns of Endless Song
Thaell Ew Totem - No idea who uses these (melee dps?) - Thuliasaur Island
With your gear/aa it is going to be interesting to hear how you do against the named, suspect it will be difficult.
You have EoK go hang out in EoK Frontier Mountains hopefully pick up a few pieces of rot Cohort gear that alone will help you a whole lot more than powersources.
SK Cohort vs
SK Castaway