Unless theyve fixed the OTPless method then you would need to downgrade unless I missread something in this thread where you use another method to get A9HL working. OTPlesss is prone to bricking (bricked one already with it).
You can do either OTPless or the 2.1.0 ctrtransfer straight from 11.2. 9.2 is no longer required. OTPless is just no longer mentioned in the guide.