Clen/T3 and Sustanon?

I’m in my late thirties. Been doing weight training alongside martial arts for a number of years, but have now decided I want to build decent muscle before I’m too old. Got the diet down, and will be training heavy 3 days per week.

I’m not going to stack, as this will be my first cycle, so will stick to Sustanon for a medium length cycle and see how I get on.

I also have a couple of stone of flab that I havn’t been able to shift (I have an underactive thyroid so weight loss is really tough). This I’ve decided to tackle with Clen + 75mcg T3 on top of intense cardio 3 times per week.

My question is, can I run both supplement plans at the same time, or will they be counter-productive? Can you work the weights and juice to get decent muscle gains AND up your metabolism to shift the lard?

Much appreciate your opinions guys, as I don’t want to waste time, effort and money and not get the results I’m hoping for.