Just put it whereever it sounds best to you, try it in every possible place. Personally I'd put it right at the end but I'm not using your gear and I don't know if I'm playing the same things as you so just find what's right for you.
MXR Phase 45 -> Digitech Hot Rod -> Digitech Whammy4 -> Lovetone Doppelganger -> AKAI Headrush -> EHX Holy Grail -> Marshall MG 30DFX
Fender MIM Standard Stratocaster
Squier Jazz Bass
Westfield SR383 Acoustic
Ibanez 12-String Jumbo
And here it is Geeked for those with short attention spans: