What can I do for double wicked wheel as a WHM?

[leprov]

Set Garuda as focus target. In tornado phase, if you see her start casting Slipstream, you know it's coming regardless of before or after jump.

Na!!! You better focus targeting the add on the MT and watch for friction! splipstream isn't the right spell to focus on!!!!!
I'm used to MT with chirada on me (and not suparna), so this may vary a lil bit when tanking suparna, but basically :
first sisters pop is simple :
Garuda+chirada both cast slipstream at the same time
chirada casts friction
Both cast WW at the same time (actually chirada's spell isn't WW, but it's the same damage output, so nobody cares )
double slipstream again
friction again
double WW again (but usually, OT already got back aggro here)

In tornado phase, it's a bit more tricky :
Garuda casts slipstream
chirada casts slipstream and at the same time Garuda invokes the tornadoes
Chirada casts friction, Garuda casts WW 1s after
one or two secs after, chirada does her WW (which is still not WW)
and so on

So basically, there is no more "double WW" in tornado phase, just "WW then another after 1/2s".

My advise is the following :
Focus target the add on the tank, and rely only on friction to predict incoming burst
Cast eye for an eye on the MT as soon as he is positionned in P1, or as soon as he throws his shield in tornados phase
Cast virus+stoneskin when friction starts
wait something like 1s
Start casting cure 2.

As I said, timing will change a lil bit if MT is tanking suparna instead of chirada, mainly because of the jump, but it's more or less the same

[Lemon8or]

It's a bit different compared to my experience with tanking Garuda + Suparna. I do agree that Downburst (which Chirada uses in place of Wicked Wheel and Suparna uses after Chirada is dead) tend to come before Garuda and Suparna do Wicked Wheel but I found that if you rely on Suparna for Wicked Wheel timing, she sometimes do Fric-Wicked Wheel-tion. She would start casting Friction but stop middle to Wicked Wheel with Garuda then finish it. It's weird so I've relied on Garuda's second Slipstream timing to put my Damage reduction up since Chirada is on the other side of the map. It's about 5 seconds between second Slipstream and WW and that's plenty of time to react.

[Aria_Stars]

as a WHM I just keep MT topped off and stoneskin up at all times for the sisters phase and tanks never die to double WW (OT shouldn't be taking much damage anyways). you should have plenty of MP even if solo healing if you heal conservatively in the rest of the phases (and don't friction the group). also, limit your Holy's to no more than 2 on plumes for MP reasons unless you know you're getting a ballad.

[PetiteMalFleur]

I keep Stoneskin and E4E on the MT. Also virus on one of them after I see friction or slipstream. However, my static has the OT pull suprana and I'll Stoneskin the melee, OT and E4E the OT. I'll then Stoneskin the MT. The melee eats WW taking about 1k damage. Everyone standing there gets quickly topped off with medica 3. Our melee dps now insist WW does almost no damage and can't understand why there aren't more melee in these farm parties. Lol

[Lemon8or]

Our melee dps now insist WW does almost no damage and can't understand why there aren't more melee in these farm parties. Lol

Because most healers don't Stoneskin melee dps. WW does about 3.5k-4k damage. With E4E proc, that's reduced to 3.15-3.6k. Adds on WHM stoneskin on melees which ranges about 0.72-0.9k and the outgoing Medica (Either cure 3 or medica 2 btw :P) and it'll look like they do no damage. This doesn't take Virus into account.