Casters are going to own at the start of a server no matter what. There is nothing you can do about this and it was true on sz, on rz, on every server.
However once melee attain gear the table quickly turns. Even in classic vztz heavy melee groups would savage same number groups of casters in guild pvp, I mean, it wasn't even close. Have a good melee assist train would crush anything, for an example of this is the last vztz box, see:
http://emu.pwned.com/showthread.php?...ght=permafrost
Where we had a melee heavy force assisting against a large mostly caster force. Outnumbered 1.5-2 : 1 the melee heavy force still crushed the casters.
Top geared melees in old world dominate casters, and once kunark comes out its just not even close. Even with a resist system that benefited casters more than on live they were still dominated.