What that is suited for is a suicide, at best. I understand that there are very little rubies and talents to work with, but you skipped Creator's Inspiration (critical damage rubies, there's not a single build in which a bard is allowed to skip them), and also, in a build based on dancing blades, what you skip? Free musician? The only rubies you should never ever skip on a build based on skill's channelling. Now, if you plan to support in astral, you'll be moving all the time. so if you cant afford those rubies, just go for flying blade instead of dancing blade.
#link# Here is something that would simply allow you to do what you have to do as support, both in pve and pvp. The Nocturne ruby in the Vocal Virtuoso grid is actually a stamina ruby, the calculator just isnt updated to 7.02 yet. You have no dmg, because that's what bards do, unless you have all the rubies and talents.
If you happen to have more talents and rubies than that, just write how many more you have so we can figure out something more appropriate.