I don't think I've ever got -14, apart from "instability burst", I've only ever seen -7 to -11 and is usually -8 or -9.
Upgrade
ALL your gear ASAP, you see a massive increase in success and it will make the game much quicker through less breakage and ability to successfully craft items 10 levels above. IMO I make sure I have every gear slot filled with approproately leveled gear, attaching stat boosting materia to it will probably make it the easiest for you.
Also,
make doubly sure that your Actions/Traits are set correctly, for every DoH/L class (same time when upgrading gear), because these abilities
DO NOT set themselves. So you want to replace those abilities that do not offer much such as the sketchy "25% less durability" for something consistent such as "Advances progress" which is always +20 progress. You want to apply basically the same thing to all DoH jobs save for any "Elemental" actions eg:
Mine is currently as follows:
* Start with Maker's Muse (L10-ensures successful attempt x3), I use only x1 where my progress increases to +15~+20 (2x if the first was only +14)
* Careful synthing watching for instability, you should have the required "Brand of..." set for whatever element shards being used, if there is more than one element shard being used, use whatever Brand uses most shards or occurs the most.
* Keep careful synthing until your progress is 60 and beyond, if not enough durability, normal/rapid synth can sometimes work.
* Grand Design/Unerring Hand/Tricks Of The Trade x2 (L36-advances progress +20) to give you +40 progress for free, so you only really need to get from 0-60
Doing this and sticking to recipes 10+,9+,8+ levels above you will get you up to 5k exp per synth.
BTW this is just for getting best exp/crafting items/, not really for low level players or wanting HQ or w/e.
