OK, to clarify a bit: stick to the suggested order as long as you can. In particular, Solaufein, then Kelsey, then Keto, Crossmod BanterPack after all NPC mods, and as-late-as-possible mods at the end; my suggested order for 'late' mods would be: Ashes of Embers, D0Tweak, Divine Remix, G3Tweaks, Virtue, Refinements, Return to Windspear (this one depending on actual availability), TB#Tweaks (although different modders would suggest a different order, EG to put their mod at the end of the stack, this combination has worked great for me).
However, when fine-tuning (EG you want to add a mod), you can relatively safely install it on top of the stack without major fears.