Each class has a role, if you know that role that is the basics. This is not skill. If a Barb does not know how to pull and when to pull he doesn't know his basic role, etc. for the rest. This is not rocket science..
Get the best Wizard in knowledge, since Wizards are the DD, so the runs are more dependable from Wizards, with 1k paragon and with 2k paragon, who both know how to stack twisters and how to position and with the same 3 supports and same maps. Who will get further?
I will tell you, the 1k will get ~92 and the 2k ~102
Wont agree with you here.
As I said. I was the wizard in my grps and it was a huge difference when I compared the people I played with. Same for the wizard of course (only that I dont had the experience for that matter). I know it's no rocket science but I can only tell what I've experienced with the people I played with from so called "high end grift communities"
Of course the grp with the 2k p wizard will get higher than the 1k p wizard (with same 3 support people). But when both wizards would in theory be played by the same guy then the difference would be more like maybe 2 griftlvls at most.
the 10 lvls could be the case if the 1k wiz is less experienced, has worse gear, caldasanns and not only the 1k paragon levels of stat points are missing. But with your example it's more like 2 grift levels NOT 10.