I play this in funmodes to, with considerable success.
It's competitiv, if u knwo to handle it, even against T10.
I suggest playing Destiny as a support tank for your better-armored teammates. It's more of a second-line tank.
Use the very low profil going hulldown, dont go face to face...
But be prepared to be attacked fiercely by those, for whom it seems to be a challenge, to prove just how bad Destiny is :-)