As it stands, I will use the Rousing Tune upgrade only when grouped with another Bard. My assessment of the other choices: (text snipped from Tessaire's post) 10 lvl train 1) Root --- Bard ghetto mez... nice --- would like this but though defense dmg debuff would be more useful...
Bard: what? Necro: Yeah, last year at the Plane of Time raid, man. Me and my alt sat in, man Bard: Oh, hey, man, you think Santa Claus is a guild, huh? No, it's not a guild, man Necro: Wha? They break up, man?