So you want to teleport after the Bard teleports (and before he takes damage), taking the damage yourself.
It's permissible rules wise, and I know due to the forum we're doing the adventure in I need to be flexible with delays in reading and posting, but I cant help but shake the feeling that you're only taking the damage because you now know he failed his Con save (which happened after taking the damage).
@Seramus would you have interrupted the Bard and taken the Hit before he rolled his Con save if we were at the table (i.e before he took the damage)?
To be fair, at the table, someone may also have screamed "No, you dolt!" to me as I said I was taking the damage. But I can see the issue.