Hey there and welcome to the forums.
I belive this to be the wrong section for your questions cause this is where ppl introduce themself.
1) Pure TE means ppl dont want anything but Time Ele.
mix TE im not sure myself but I belive its whe you for example take TE and Potions.
2)Bump = Bring Up My Post.
We use it in the Trade Center so we dont have to make new Topics.
Have fun here.