Stone Greatsword TWoP is a weapon attack, not a self-buff. So you can still use Self-buffs.
TWoP miracle is a self-buff, you can't use self-buffs, but you can still use special attacks.
Neither version of TWoP conflict with each other, you can still cast TWoP when you have Stone Greatsword TwoP on you and vice-versa. You can alternate between these 2 casts to loop the miracle for up to 100 seconds (1 minute and 40 seconds).
Just though people should know this exists...
You though this was just the "lol spamz the R2 for loop..."