As ridiculous as it is, I've found the best way to get comms as dps is to sort of force yourself to be noticed for your contribution. I have macros on my BRD announcing (very simply, no crazy speeches) when I use any of my songs, I make sure to be the one that uses the LB on a huge trash pull, say hi or joke around in party chat during the run. It's a lot more effort to get the same results healers and tanks do for just silently doing their job, but... hey, whatever works.