PANS OPS still uses 30 degrees of runway alignment (and other criteria spelled out in my previous post) to determine if the procedure qualifies as straight-in, as well as particular obstacle clearance plane considerations.
However say there's an IAP for rwy 29 (the aid could be u/s hence why you're circling, in theory) and the circling minima attached to that IAP are higher, do you still use the rwy 36 minima or the higher rwy 29 minima? Does a higher MDA suggest another obstacle not considered for rwy 36 or do circling minima for any IAP consider the same area regardless of which runway you're intending to land on?
If you're flying an approach to runway 29, then you use the minimum criteria for runway 29, regardless of the runway to which you're circling. If restrictions exist for circling to a different runway, they'll be spelled out in the procedure you're flying. You do not need to look to the procedure for another runway, to determine your course of action for the procedure you're flying now.
If you're flying an approach to runway 36, use the runway 36 minimums. If you're going to be circling to runway 29, you need to stay within the obstacle protection area developed for the particular approach categoryin the circling minimums applicable to the published procedure for runway 36. You do not need to look up the procedure for runway 29 and attempt to superimpose the minimums published for that procedure...because you're not flying it.
The minimums for the runway to which you're circling may be higher...but these aren't runway minimums, they're approach minimums. You're not flying the approach to runway 29...you're flying the approach to runway 36. Therefore, the only minimums with which you need concern yourself are those to runway 36. If you were flying the approach to 29, then you could worry about the minimums applicable to that procedure...but you're not.
If there are issues with obstacle protection, this will be spelled out in the procedure notes (eg, no circling west, etc...the procedure will spell out any particular terms or conditions by which you must abide).