[Deleted]
Combining Multiple Prefixes and Suffixes
Gilruin
#2327
Nothing recent I think, but Helge has written an article about it some of the things in there are more in the realm of Common Eldarin word formation than Quenya affixes but it should give you a good overview. As for how many you can stack? Probably as long as it still makes sense, which I'd say usually maxes out at about two prefixes and two suffixes.