Catherine, sounds like she's used to some sort of attention from you in the middle of the night, so I would stop the patting and the rocking or feeding (especially since they are all ineffective) and either do wi/wo or the gradual withdrawal method.
With gradual withdrawal, you sit by her side until she's asleep and then move towards the door every couple of days.... but if she's playing around or putting on a show for you, then I would probably go with the wi/wo method
Also wondering when she went down to 1 nap and maybe that nap is too early in the day or too late in the afternoon, which is causing these nightwakings? What does her daytime schedule look like? When does she wake & what time is the nap?
The inconsistency has probably not helped much... so from now on, I would pick a method & stick to it!
hth a little & let me know how you go
Layla