yeah i do this a lot. What i also do is weave my no cooldown HS with DL or HL or both depending on procs (both if i get a crit on the HS, you get the idea).Casting two HS in a row is a waste of procs, also A HS followed by a 1.6 sec DL then an almost instant HL is a lot of burst healing and usually tops off even badly spiked tanks.