I was wondering how everyone here has their skill points spent? I'm lvl356 and have a hard problem just started being able to get lvl9 or 10 gems by the end of the map.

Here's what I would recomend you try, RYL first in a tower but once it has 10,000+ kills put it in a trap with amplifiers that have either red or yellow pure gems. The minimum you should have your bloodhound special in a trap is 200% and yellow at 30x, so at 10,000 kills you have a minimum trap damage of 20,000 X 30 = 600,000 minimum damage hitting multiple monsters. Then just focus on raising the yellow as high as you can get it. This only works if you summon almost every wave, otherwise forget about red and either use a dual gem or use a color that you think is best.
OL and OLB are great in traps but not worth it until at least grade 12.
Always remember to mana pool as much as possible to get your multiplier up.