First off, awesome RMT!
(I wrote something longer but got busy and lost it)
I shall say however, that I admire your usage of MixMence despite some saying its inviable.
I use a very similar, weird one, and know of its power!
I totally agree on changing Rachi, or considering Jellicent over her.
I can see it killing time and allowing switches by attracting EQs and such, but with Tornadus gone Jellicent will be forcing more switches and SpinBlocking simultaneously; which is crucial for stall. You know the team better, obviously, but through the read I've concluded that Jirachi isn't covering much that your team doesn't already have pinned against the wall. With that said, awesome job!
Formerly known as J-CoolKid in DPP, quit pokemon but am now back "in it to win it". Call me J.