Let the record show that I am entirely capable of spelling Rapidash correctly. To say "spell it right" is improper, as you'd be using an adjective, "right", to modify a verb, "spell". Clearly you aren't intelligent enough to post decks if you can't even follow basic rules of English properly.
As for Pachi, I implied running one of him a means to fill your bench, akin to a fifth Call Energy. He also helps the Palkia-Lock matchup by killing aleins and doesn't afraid of anything. Pardon me for assuming that if I referenced a card to be used in the same function as it was in a preponderance of decks since States (as a one-of-tech), that anyone would misunderstand me and think I was implying 3-4. I will buy you a card from Hallmark to apologize. What's your name and address and I'll put it in the mail tomorrow.
As for the mid-to-late game that you're referencing to with your engine, I'd recommend maxing out Poke Radar and Dusk Ball in addition to your other stuff, or at least running thick sets of both. Otherwise, you'd essentially be playing a bench-heavy version of Kingdra with a bad weakness for which there exist fewer counters that could be fit within your deck. The good news is that you could probably OHKO Flygon, however the whole BTS thing giving them immunity means that if you don't go second you can't lay down BTS (you attach second energy, they go attach second energy, sand wall pitch BTS, you can't KO that turn assuming you haven't done so already).
Given your current list, cards like Azelf are completely unneeded - you have no one-ofs that merit retrieval via time-walk, and given that you are already fretting bench space, it's not worth the odds of starting with it relative to the odds of prizing two Claydol or something similar. Ditto for Uxie. Especially including Pachi (hence five possible Call-esque starts) you'd be better served by a second Luxury Ball. Even though it creates one dead draw, it'd greatly increase the chances of you hitting T2 Claydol. If you'd rather not do that, pack a few draw supporters for if you get power locked.
Not to mention there's SSU. Thanks.