I would personally use the 4-Andro with the Tbol. I've ran some SARMs, PH's, orals solo, with DHEA, with Dermacrine and with 4-Andro and the runs with 4-Andro I've felt the best.
I've also done a Mechabol + 4-Andro for 7 weeks (Mecha should be pretty close to Tbol in effects), which was a pretty nice run, and based on how I had to stretch my PCT for added weeks, I think I was pretty suppressed and bet I would've felt pretty crappy without the 4-Andro in.
I understand the general notion of not stacking things on your first run(s), but I think 4-Andro solo to make no sense in most cases and Tbol solo to possibly be a bad time. You could also start the Tbol solo and have the 4-Andro on hand and be ready to add it in in the latter weeks, if you start to feel too much of suppression sides.
If going oral 4-Andro, then I'd recommend 300 mg a day at minimum. The Hitech product is likely very highly priced. Hard rock supplements Andro the giant would probably be a better choice. I prefer TD. You may still find Alpha Gainz 4-Andro. And Iron Mag Labs still makes TD 4-Andro.
Just my .02$