um... I am probably the expert with this, no?
and, yeah, not really GotP without those phase shields
alright, here is the "heart" of GotP (PvP version):
1) get as much quanta as possible, as fast as possible, in other words: almost half of your deck should be pillars/pends
2) depends on your opponent's deck, try to draw out PC with eternities and hourglasses (I include precognitions in my PvP GotP to see if my opponent has any), then chain dimentional shields
3) now that you are chaining dimentional shields, you should get your eternity to work, deny his draw to prevent him from drawing PC
4) keep doing what you are doing, use hourglasses to draw more cards if necessary, no real worries of decking out (you have eternities)
5) once you get the quanta, fractal your GotP for OTK (or 2TK, depends on how much damage your eternity has done)
NOTE: you can play your GotP whenever you want, but keep it from dying if you only have one GotP in your deck, I use 2, so I usually keep one in my hand, play the other one for some extra damage