Test e and eq don't need bb @300 or lower . deca probably doesn't either , but I always add 10% just to be safe .
Prop , tren ace , and sust will all hold at 2%15% easy , and I've seen prop and tren as low as 1% 10% but that's pretty much where you start running a good chance they'll crash especially if you don't have your brewing technique quite down pat yet . if your not worried about super low solvent gear 2/15 works for most everything outside of a few odd compounds, and if you are its a safe place to start tweaking your recipes and dialing your solvent ratios back ..
Just make sure you right down everything you put into your brew incase shit goes wrong because you can usually rectify most mistakes .. I just made some oil base Winny and had to adjust the recipe probably a dozen times before I got it to hold . if those are the only compounds you're working with it should be easy as can be though ..