Doom assist combo help!

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3:01:14 the combo is my problem.

So i was watching the level up replay and saw some strider tech from clock work using vajra to hard knockdown after sphere flame ive tried for about an hour to try and replicated this and i find it impossible does anyone have the know how on how to do this? he almost somehow performed the super whilst otg’ing with h before strider even came out, yet whenever i try the assist simply does come out or comes too early before the super
soo any help guys? all help appreciated.

From what I’m seeing/trying, you have to call Vajra right before Sphere Flame. Literally do it right before you cancel s.H into Sphere Flame, not as soon as you get the OTG.