On older servers a lot of 85s don't bother trying hard, so top 10 is simply who wants to use coupons rather then which class is best. On my atm it's 4 fire/4 light/1 earth/1 wind and after it's a lot of waters/lights. I can still easily get into top 10 as light, but i normally just buy 30k coin boost and don't buy revives just to get top 20 for 25 coupons.
But the new talents in 2.0 did change stuff a bit, Fire and Water got better, rest stayed same.