Best grab for back/front flip speed?

[Siddhi]

I'm fairly new but I've noticed you can increase your spin speed by tweaking grabs in a circle to throw your bodyweight around into the spin. The same goes for some tweaks slowing down your rotation speed if the energy shift is counteractive to the spin direction.

I was wondering what the best grab to do this is for front and backflips to get them to spin faster? I've learnt how to flip properly but was hoping one of the grabs would be good for this technique.

[Kookyoo]

Like in real life regrouping your body around the rotation axis is key to rotate faster.
So avoid nose or tail grabs that works well with horizontal rotation, when you try to flip but prefer more grouped grabs like indy, melon, weddle or stalefish.
With the right tweak even the simplest grab can looks pretty cool ;)

[Siddhi]

Huge developer answer thanks g