I actually took a break (longer than what i was expecting at first

) of almost 1 year and now i'm trying to catch up what i missed.
My char is lv 99 so i can actually go in Alexandria.
So first, i see that alchemy changed a lot. I see that now you need same lvl elements and tablets to make stones, which I find nice. But question: Does the elements we get from stuff 11D mobs drops are only 11 degree? Or we still get lower elements as well?
And when you destroy items, you only get same lvl as the item elements?
Now about the instances and the 2 restricted lvl areas (100+ and 105+ ones).
I read we get coins from mobs there. Is it in both areas? What are coins used for?
I see the first one (100+) is indeed an instance, but is the other one 105+ one as well, or its shared by all players like a normal area? It seems so, because i read you can actually kill other players there? Must be cool, it means no bot there right?
Thats about it for now. I'm also curious about the socket system, is it any good? You can buy them with gold or is it special currency? I see those give you skills that are usuable like normal buffs? Really useful or useless feature?
Thanks for your time! Might have others questions later