At this point you're generally have crippling poison and are slowed so can't get away, walking slowly and rogue is still tearing you up, probably 30-60% health at this point, you can turn around and just start bombing the rogue with your own attacks but it's a losing effort cus he's full health and has a big headstart with you at 30-60%, can put down earthbind totem but that won't do anything against crippling poison.
Can try to hex him to buy a little time but usually will be kicked/interrupted by decent rogue.
Only thing I can think of is immediately pop shamanistic rage and wolves, then turn to rogue and start windfury bombing him hoping that wolves plus maelstrom 5/5 proc will allow you to heal yourself back to full or close to it with lucky heal crit and then you're on even ground with the rogue but usually it doesn't work out that way.
Is there ANY way for a shaman to get out of a rogue's stunlock and get back to a decent distance to kite him a little bit to get it at a level playing field? Or is it because once he opens on you, you're stuck in a phonebooth type fight and whoever has more crits and procs smashing each other with every possible ability will win?