First: yes, but I just never use thorn in the monster waves (but it is the principal resource in boss moment) but I use conjuration and condensation. Condensation makes me able to do something as a double meteor to be used in chapparitionās first second. Just need to cast, charge meteor during the time that spheres takes, then trigger the sp pot in the right moment.
Second: no and āyes at the momentā
My idea was to have two circles that could work in each other cooldowns. So, I start casting theurge/drain and then all my dark skills, then I start elementalist circle, when I finish, I can reuse all my drain-bursted dark skills again. This was my plan, and itās a good plan, but āat the momentā theurge/drain are bursting all skills, even storm dust, electrocute and meteor, so, Iām been a little more desorganized in cooldowns and giving preference to start with condesation/meteor then going for anything that I want.
Linker seems good with shadow, but you will feel yourself limited by jpās time, thauma3 will take off you aoe performance. I even have tried Wizz3(lethargy atrib)-thaum3-sorc-shadow3 trusting that the boss would do the aoe for me, but not even close. And thorn wasnāt doing that strong without drain or curse.
There is the option to go full mvp too. wizz2 (surespell for rc) ,linker3 (defm debuff and link), thaum (shrink body atrib to apply on the boss shadow), Rc (defm debuff and a little aoe) and shadow3, but again, not that much aoe.