There's no set order that all people will agree on, so experiment a lot! But from my perspective I'd recommend the following
Timmy>Barber LTD> DS-1> RC Booster at end will give more level, in front drive your pedals a bit harder (whichever you like, try both!)
same for me. I like my Timmy as my tone shaper. Remember the latest pedal in your signal change is the sound that your tone isgoing to takeI'd probably flip the Barber and Timmy in this order, but that's just my pref. Otherwise a good start.