I am definitely doing it wrong, as for example when I, (as you have said, with my high level Arcane) wanted to join some raids people only wanted the less survival melee, because they have already had one caster in the group. I couldnt imagine why they said that when my wizard, regarding to the posts here, can:
1- Completely avoid all damage, even with red DA
2- Group up all the mobs and kill them all with one spell, without endangering himself
3- Have perfect survivability due to one spell.
I wonder if all wizards are like that, what do melee do? Picking flowers in the back?...
Cogdoc
P.s.: High level artificer whom I had such experiences with in a raid? No, but thanks for the compliment...