a lot of unasqued questions from a lurker that came out from the shadows

1. Is nx necesary for a decent dualer?
   
2. do we need hp wash after bb (let's say for gunslingers, dualers and shadowers)?
   
3. how many hp will an unwashed aran have at lvl100? (also, is it necesary to hp wash?)
   
4. Which classes can survive decently without hp wash? (besides warriors)
   
5. what's the deal with all those rings? how can a n00b get some? (rings were quite rare back then)
   
6. I've heard that everyone is joining the page/wk/paladin bandwagon after the bb changes, why is that? do they have good dps? is because of the heaven's hammer?
   
7. I'm considering gunslinger, page and aran as my new char... the fact that gunslingers have low hp is disapinting because I won't be able to boss decently without wash, arans are disapinting because they're soloers and they don't have any party skill, and pages because of the low dps (correct me if I'm wrong with that) any advice on thos clases?
   

*edited* now with more questions