hormone replacment or testosterone replacment therapy IS steroids.
typical applications are androgel or testosterone cyponate which is a longer estered test
typical trt dose of test enth is 250mg per week.
so in that case if you run a test based cycle you would want to stop using the androgel and just run the cycle as normal.and then after continue on the androgel like you are now.
I suspect the reason for the low test was a failed pct from your last cycle.
you did not recover fully yet which caused the low test levels.
Just out of curiosity, what would be the advantages or disadvantages of running them both together? Not that i will but still would like to know.
IMO no advantage or disadvantage
its just running 2 different types of test together you will have a slightly higher amount of hormones floating around.
what I would do personally is drop the androgel,save it refill it like you normaly would ect but run test enth injections.
and then use the androgel as a taper after your cycle and then you can resume at your normal TRT dose after your taper seamlessly