1. Go to the top left area, near the small pool of water and mine Hesperon. They are commonly found there. Else where they are hard to obtain.
2. I guess, you don't bother to read this:
3. Any glyphs work. There is plenty of free codes available for this. My personal favourite is Flare_eyes as you can see from my profile picture.
4. 10 relics, you can do that in 30mins via capture fissures. I did the 500 kills in 5 exterminate fissure missions with Ember.
5. Don't care about this.
6. Rift Sigil came before Arbitrations. Get your facts correct, you silly giraffe.