the 2.2 mm stuff is for throwlines or light gear pulls, or "stuff". could be used for hammocks and gear slings of that sort. NOT for climbing.
i have the Top Croll, and the Sequoia SRT. should be super comfy, and a good gear hauler and arb harness.
also as i may have mentioned a couple other rock oriented harnesses, from a very old and never to be used Black Diamond Bod Harness to the newer model of that - but rock gyms don't like people using those, so i was forced to get a BD Momentum Al harness 2-3 years ago, lightly used
alas. most comfy thing ever, except the Sequoia STL.
likely going to have a few ascenders and toys in the next while. fun! have old school Sticht Plate :> actually, i'll use that for rigging tree and lowering stuff... plus a "tuber". nothing more modern like the ones in your photo, though i am considering them.
i found a brand new 200 foot Maxim climbing rope in my "way back". never used. kept clean and dry (stored and forgotten). safe to use for human support? or ... is it going to be a heavy gear line? does this stuff get brittle? or is it like, you know, bomb proof?
probably going to end up with an 11.5 mm arb line soon.
oh, the Petzl Zillon looks the bomb. should go nice with the zigzag. also the adjustable flip line - i like the design on that. keep those tails tucked.
these also look interesting as a backup (parallel system line in another tree) and for "bad things"
https://www.petzl.com/INT/en/Professional/Mobile-fall-arrest-devices/ASAP-LOCK