Between flanger, phaser, and chorus. I know some people swear by putting phaser or flanger in front of their dirt. But for me, with an MXR Micro Flanger, it was just too subtle in front of my dirt pedals. I just obtained an MXR Phase 95, and currently have after dirt with my flanger. They’re both going into front of amp, which I do have on the dirty channel, but with low gain. And my chorus is in the loop along with delay and tremolo.
I like my phase 90 (script version) before dirt. It’s subtler, more natural and kinda pink floydy / phishy. Every once in a while I’ll try it after dirt and it doesn’t sound as nice to me… Kinda artificial.
I’m still figuring out where to put my Mooer Elady (which I use for subtle chorus sometimes)… It seems less picky about pre/post dirt but I could be wrong… Still figuring it out!