Bard will not have to move for a good time whilst the first 3 mobs are being killed. I assume this will be plenty of time to regain MP. The only reason I say that long range is necessary is due to the fact of 1 member's distand seperation from the group means no links when pulling. The rudamentary mockup I gave earlier displays the necessity for a longer ranged attack.
If a BRD is of appropriate level to be pulling from a worthwhile group of EXP mobs, then absolutely death is a threat. Having 4-5 Lv50 Ixali on your little Lv40 frame is going to hurt quickly.
I'm sure that Utsusemi for Bard will give it some advantages for survival, but does Second Wind favored to PGL make it invincible? Does Life Surge mean a Lancer can never die? A bit thin for examples, but I hope you can follow what I'm trying to say.