made my guard/sorc because it not a common tank atm. I always see guard/bard or ravager. Based on my experience, rejuvenation mantra, blood seal, some ultimate skills and sigrun is already enough. I focused more on spd/def for spamming roar, bash, phalanx and mirror shield.
Though, it is not as good as guard/bard in facetanking,
it is still worth playing