This is a buoyancy question - I'll assume that we all have a bailout strategy for gas...
Dumping lead? The only thing you have keeping you down? I don't think so!
My order:
Wing - I haven't been using this (I suck a vacuum on it before diving), so that's 16Kg to play with.
Dry suit - must be able to get a few more Kg's in that before the neck seal starts burping...
Buddy AutoBlob - an instant source of lift, and if you're cool enough to send it up on the reel, you can now reel yourself up if you have to!
Counterlungs - things would have to be pretty bad...
Lift bag - would be fiddly to do, especially plummeting downwards...
If all else fails, I could always invert and fill the DS legs too. In my case, that would have to be 10Kg+ easy.
In short, I don't think a flooded loop calls for lead dumping and uncontrolled ascents.