The Circle of Elements - This quest, I could have used some of those 100% invent things. Those keys in that quest made me extremely snappy with all the fails. I did not use anything above what I normally use and I failed more often than I got it.
I even snapped at a PvPer that hit me, trying to steal gold I needed to buy the parts I needed to buy. Very frustrating inventing arc and very very expensive.
Those that use those things for every single invent, are you the ones here now saying to get rid of those potions? As with so much today, there does not seem to be much in the line of personal restraint so others might have the chance to experience it for themselves. What a sad comment on human nature, pity too.
I've had bite serums and mystic pickaxes fail, it's frustrating to be sure, but it's not the pot that lessens the chance of a fail that is the problem here so much as the one that allows you to retain the ingredients. In that, I agree with EP on this, simply because these pots are so OP as to remove any risk factors from the game, as well as overfill backpacks and the game with stuff nobody wants.
As for PvPer's snatching gold when you trying to invent something, I understand that, but there are deterrents that work well.... I think I've mentioned them countless times in this forum. In MOST cases they work for me... unless it's Spidey, cuz he don't care, he just loves shiny things..... But if they get to be too much of a nuisance, gather up a handful of friends and set a time for all to be around at the same time, and take the thief down a few levels. Hopefully by the time they regain them, you'll have leveled out of their range.