You can't go wrong running 2H in 90% of situations ; you provide both very high protection to your team (group absorb and stats stealing) and very decent damage using 2H and Ether Dance + potent enchantments, plus a small healing support if you run either Bolstering Enchantment or Blessing of Heaven.
In small group play, 2H is the best you can have, because you need more DPS to assist you teammates dropping a target. Healers you can jump on (with M1) in the back will likely panick because ED + taunt will hurt them a lot, not to mention you can spam-debuff them (at least Shamans) while under WW buff, wich is uber nasty to them...
In 10% of engagments, like keeps/forts/cities content, you can get slightly more from SnB specs, but gain is marginal ; Crushing advance + Vaul's tempering are good buffs, and most middle tree tactics are very good to use, but you can do very fine in 2H using Wall of Darting Steel only (wich virtually buff your parry around 100%, and other avoidances to 75+%), and dropping left tree to get Vaul's Tempering and Vaul's buffer in middle tree (note that it's also valid for a SnB spec), like that : https://builder.returnofreckoning.com/c ... 9,503,9043
In the end, both specs are perfectly viable, but I find the 2H spec (with Crimsonwind from C&T) very much enjoyable, because it not makes you papermade using 2H weapon, while allowing you to do decent sustained damage.