Need Advice - FDD/TAS

For background, currently a big 4 auditor with 1.5 YOE + CPA. My end goal is an M7 MBA, but looking to pivot to FDD beforehand for better and more relevant experience. Have a few questions I need advice on regarding next steps on this path.

I am actively applying to senior associate FDD/TAS roles - is it too early to apply for senior associate positions given my YOE, or should I apply at associate level? My concern is I won’t get promoted for another year if I join another firm at associate level, given I will receive my senior promo in audit this summer. Would it be best to wait until summer promo to make the switch to senior associate easier?

Alternatively, I am considering applying for MM firms like Kroll. Would this carry similar prestige as big 4 firms in delta market and business schools?

TIA!