is the probility to get veiled crystal higher if you are salvaging Ancestral or Sacred items? Are the peices that seem to gives low odds of getting them or some that dont at all?

I wouldn't bother worrying about it overmuch. You simply cannot get hordes of crystals until you're in t4 no matter what you do. Once you're in t4, you don't need to salvage anything you need to sell everything because rerolling stats is so expensive and crystals rain down from above.

This post was edited by Vastet on Aug 3 2023 11:10pm

Shockingly , I hit lvl 100 and played 10+ hrs after that, and somehow ran out of crystals.... Mainly selling some salvaging but not much and ran sarats over n over till 100 and then some to find gear, IT seems like re rolling cost got more expensive bc of the seasonal journey or something. Idr it being 15-20 crystals per re roll. Or maybe i have way more gold now so im able to afford more rolls at once.

I stand corrected. I have noticed season has been hard on mats but it was leather that got me until I hit t3 maybe. Since then only gold has been an issue and I haven't salvaged anything in ages. I guess I can expect a problem and that salvage season boost looks more attractive.
I haven't personally noticed any difference in salvaging things between normal sacred and ancestral but I have only put a very little amount of time into seeing if there was any difference my results aren't useful.