Advice - when to start blasting

Background, I'm in NZ and am on prescription dose of 100mg a week. The maximum docs will prescribe here is 200mg a week but my clinic won't agree to that.

Last bloods

Test 18.7
Free Test 495
Hb 160, HCT 0.48
FSH < 0.4, LH 0.3
LFTs normal
Electrolytes and Creatinine normal
Lipid normal

Have taken matters into my own hands and acquired my own source and am thinking of a blast/cruise of 400mg/150mg dose.

I'm currently cutting, have lost approx 8 kg (18lb) and would be around 20% bodyfat at 5 foot 10. I've got decent muscle, but I'm just wanting to put more on.

Here's my question - would it be better to keep cutting before upping my dose? I'm thinking of continuing the cut to the end of Nov to get down to 15% or below then trying a lean bulk. Would it be best to hold off upping my dose till then or maybe just up it to 150mg?