There are a lot of strong core builds right now. If you exclude the outliers(scourge, spellbreaker, firebrand), they are very competitive against other elite spec builds. Let me just briefly list:Retaliation core guard. Lots of damage and decent sustain. Much easier to play than dragonhunter and is still effective.GS/LB core warrior. Okay damage, tons of sustain and anti-condition. Very good duelist overall.S/D power core thief. Top duelist with relatively low risk. Only counter is D/P thief.P/P condi core engi. High condi burst and decent survivability. Slightly less than meta but not bad at all.Fresh air core ele. High damage and decent sustain. Only hard counter is good thief.