1) Unstable elements decrease the higher you get in rank compared to the synth itself. You see a TON of them when you are really too low to synth the item. If its 9 ranks above you, blame your rank, not the fact it goes unstable.

2) Hasty Hands gives you half SP. By using rapid when its doable(usualy when you pass the optimal rank of the synth) then you can still get full SP for the item, it can add up over time. So if it gives you 100 SP for the synth, you could get 50 from hasty or 100 from rapids....if your doing alot of that synth the 50 sp lost can add up.

3) The crafting times keep getting reduced, but it takes roughly 45 seconds per synth now unless its well above your rank.

4) Hq items require you to get high quality. Your rank MEANS NOTHING in this regard except that you wont fail bold synthing(the way to get more quality) to raise that chance of getting an HQ. Want a better chance, use HQ mats too.

5) Most abilities do suck, also keep note that most abilities DO NOT STACK, when you use one the other fades immediately.