Is it possible to enable Heroic-mode for Jin'rokh, and after defeating him have the entire raid out of the instance and setting difficulty back to normal to advance on Horridon normal mode? I think we might be ready for Heroic-mode Jin'rokh, but definately not the rest.
I dont know if this is just me or Cold Snap really isnt on cooldown for 3rd Ionization. I've moved to GI and will stick to it plus i can save Iblock for orb jizzs
Using GI: I use GI for the first and get a dispel. For the second, your GI won't be up right away - so let your dispeller know that, wait for your GI to be back up again and you can keep on DPSing and let your Ionization fall off naturally (just make sure to step out of the pool and use GI before it does). Depending on the timing, you can get out of the pool right away and GI for the third ionization or GI and let it fall off naturally without a dispel.
This lets you save ice block if you get caught in a bad spot during Lightning storm.
I haven't tried cold snap with iceblocks for immuning the ionization , other mages that I've heard from haven't seemed to have much better success with it though.