Completely irrelevant.
Do you really think that Sakura is able to blitz mei, a kage level shin obi who reacted to madara uchihas attacks with pure speed of forming hand seals ? Mei definitely is able to react to sakuras speed, no discussion.
When Sakura is in mid air using shanaro she is vulnerable to lava style or water dragon which catches her out of the air smashing her to the ground (lava even could finish her directly) Shortly after this Mei uses acid mist to melt her away.
To much of hardcore wanking, i can't even take you serious.
Mei reaction feats:
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Sakura:
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The scenario with Madara above is the same as what will happen here.
Her Lava style is pretty slow and wouldn't be able to contact Sakura while she's closing in even Karin had time to react to it.
Sutton can pressurise her but it can't put down a Byakugo user.
Once Sakura comes in close range there's no using hand-seals:
She get's blitzed by:
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So please just leave.