Went ahead and made a first pass on Kalecgos. Keep in mind I see the fight from the warrior's vantage, though we do run with a paladin tank, and these are concerns we pointed out.
Kalecgos / Sathrovarr: Offsetting
-Depending on the strategy used, there may be phases where Kalecgos' tank will only have ~2 healers available, and a preemptive cooldown such as last stand or shield wall may be integrated into the strategy intentionally. (Possible advantage warrior)
-Tanking the end of Kalecgos' enrage does not require shield wall, but the hasted hits for 10k-12k sting quite a bit without it. (Advantage warrior)
-Divine Shield may be used to remove arcane buffets and extend a paladin tank's fight time on the dragon significantly. At least one person has tanked the entire dragon phase using this method and arcane resistance. (Advantage paladin)
-Divine Shield and Blessing of Protection may be safely used as panic buttons on the Sathrovarr phase, saving a dying tank by dropping the demon back onto Kalecgos without endangering the raid. (Major advantage paladin)
-Depending on raid composition, there may not be a guarentee warriors will be present to apply demoralizing shout or thunderclap to both bosses at once. (Advantage warrior)
-Due to the sunwell accuracy buff, holy shield may not be sufficient to give active uncrushability. While the boss cannot crush, this means unblocked hits are very likely on both warriors (who will have shield block torn through by the low avoidance rates) and paladins (who may not be able to meet 127.4% character sheet avoidance-block). I guess you may have to look at it as a small reduction in effective health, since block value is normally counted for mitigation and is unlikely to be 100% reliable with progression-level equipment. (Minor advantage Druid?)
-Splug
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(Usually) Prot warrior:
http://www.wowarmory.com/character-sheet.xml?r=Illidan&n=Splug