To give an example: juq- "to burn" > juqō "a burn" > juqrī- "painful" > juqrayyō "pain, torture, difficulty".
The result is a normal -ar stem noun (though I may use other noun suffixes as well, for added variety). Here is juqrayō's paradigm:
As for the other kinds of nouns, I'm thinking of having normal -ar stem nouns have the ability to derive other nouns from increasing the -ar- suffix's grade to overlong, creating -au-, which then collapses to -aw-, though these use -at for their suffix; for another example: ot- "to give" > ātō "gift" > ātawat "reward". This has some nice variation in the paradigms as well; the DEF.SG.NOM is ātawatā [a:.ta.wa.ta:] but the DEF.SG.ACC is ātautāya [a:.taw.ta:.ja].
...This post could practically be a whole damn post in the Pazmat thread. I really am talking to myself here, but I have 3 and a half hours till my next class begins so I might as well ramble here.