The low level armor spheres are basically worthless for HR armor though. The basic ones give 1 point per sphere. The armor sphere+ give 5pt per sphere, so already they're 5times better. The advanced armor spheres you get in HR give 20points per sphere. The hard spheres you get once you're at the elder dragons give 80pts per sphere. That means if you keep all your basic spheres as you level, you'll get like 1.5bounties worth of spheres from low level and about 6bounties worth of armor spheres+. That's really nothing in the end, meanwhile increasing defense on your few good pieces as you level means you don't have to farm for new stuff until HR and you get good defense values.
You don't even need that many spheres unless you have a ton of different sets of gear, which you will eventually but at first you kinda want the pieces that work without deco and there's not that many good ones.
I haven't even come close to running out of spheres. Hell I haven't touched my hard spheres yet, just using all the advanced ones I got from HR as I was progressing.
Also fuck those Vaal Hazak fangs. Fucker somehow dropped 2tails AND 2 gems in one kill, even though I didn't even cut his tail, but I'm still sitting at one fang after 5kills. I'm destroying his face too so it should drop, but it fucking won't and I need 5 of them for a lance. Hoping my fucking cat will somehow score some, he got a gem on the double gem kill. Wish there was something to do with these stupid gems too, I have a bunch I don't need but I don't even think you can meld them for other gems which sucks.