So I'm testing deep destruction at the moment on the ptr and I've gotta say these are not buffs, my spec is this:

http://www.wowhead.com/?talent#IZcu0hkNZVbGVdMuVoAcct

I'm using glyph of Conflagrate/Lifetap/Incinerate, here is a screenshot of my recent dps on a heroic target dummy, with the same spec using the same cooldowns on live I do nearly 1000 more dps.
Now I think conflag looks to be bugged on ptr, cus if you look at my screenshot it only hits for 1000 damage, 12 seconds of immolate is a hell of alot more damage than that.

On a side note I really enjoy conflagrate with glyph on live atm, its alot of fun to be able to be on the go and drop a conflag on yogg-saron adds while avoiding clouds, having to refresh immolate everytime I use conflag is troubblesome and antiquated, I don't so much mind the bonus to conflaging if immolate has less than 5seconds left on it but if conflag eats the immolate too is it really necessary to wait for it to tick down to the 5 second mark?

Deep destro on live and ptr are both uninviting, it's a damage loss over a felguard/ruin or haunt spec, and alot more to micromanage, also I dislike not having access to master summoner and mana feed in raids/heroics as soul shards are alot easier to get but resummoning a pet is still too troubblesome,
avoidance and replenishment only go so far.

Pic of dps

http://img23.imageshack.us/img23/4149/wowscrnshot043009231854.jpg