I firstly want to wish you the best of luck, I love RQS seeds and I am currently growing some don't hesitate to check my profile (IΒ΄ve got a Hulkberry Auto too).
As your strain is autoflowering, itΒ΄s not best recommended to apply topping. On the other hand, Lst could be very beneficial! So I would recommend you going for LST only. It doesn't mean that topping doesn't work, but in case anything goes wrong, autos have less time to recover, so it could badly affect your yield.
Cheers! Keep it up
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