I've been playing on my iPad via Splashtop streamer. It allows you to stream your PC and gives you the option to touch-to-click, which saves mountains of time over the alternative "track pad" mode which means multiple swipes just to get a cursor in place and click.
The only issue with this is that I was pulled into jail by Mod Terror and asked what device I was playing on as there was no cursor travel between clicks... This leads me to think that if I play like that again, I might get banned for appearing to be using an auto-clicker or bot of some sort... So, much to my dismay, I don't feel like there'll be a feasible way to play on iOS any time soon.