Level 2-3 Explosive chem for Grenades, Claymores, Mortar Shells, and c4. Level 4 is only good for rockets only
For incendiary properties for OT explosives, its 3 OXI - 1 FUL - 3 FLW or 5 OXI - 2 FUL - 5 FLW
Former lets you reach max grenades, and claymores, latter lets you reach max rocket and mortar shells, this should leave room for Iron for shrapnel
As for flamer fuel, they work completely different with OT explosives, but generally you want a mix of OXI FLW and FUL, FLW being the least, generally you want both OXI and FLW the same level and FLW only like 2 at most. Fire pen is also really important.
Yes, sometimes they dont dissaper, its buggy, sometimes the level is a combination of all three properties level, or its 1. Theres a lot of properties that dont work together and actually lowers each others level, so something like Transformative cant have Anti Toxin because they are incompatible and cancel each other out. Can use this as an alternative to relate to not lower OD. Theres a lot of properties that can be made, most important one is BNM with CRL and NTR.
I forgot the others but vigour is how fast a plant grows and potency is for the yield and how much chem per unit are in the plants, those are the only things you need
Grass/Wheat for vigour, Chili/Lime for potency
Just want to also mention with Thymol, it sucks, if the APS level isnt high enough, it either just slows or freezes the growth, and im pretty sure Thymol just slows its progression and something most people dont know is it does damage too.