Fast way EXP in classic is AOE party and u need proper pt for that (Tank / Bard / Buffers / DPS)
For solo exp play dps classes like phantom ranger / necro / sph (u need boxed buffers)
i think with 2.0 coming (olym / new farming spots / new skills) we may need some changes about class change service
and seriously its so unfair mage players cant reroll to any other dps classes because they are " TOP AOE IZI EXP " ?