Nuker build, need a lil' help.

Ok, so i just started playing cSRO, and the last time i played iSRO was at like level 70 cap. So, anyways, what do you guys think of this?

80 - light
80 - Bicheon
80 - FIre
60 - Cold

Use the light imbue, and fire and light for nukes. Use ice purley for defence buffs. Bicheon for knockdown and stab, and the chain series. and get the buffs from fire and light as well.

Do you guys think this would work?

or maybe something like

90 - light
90 - fire
60 - bicheon
60 - cold

Also, i've been reading alot and this could be an option as well

100 - ice
100 - light
100 - bicheon

or

100 - fire
100 - light
100 - bicheon

I've been seeing alot lately where people have 2 embues.. i don't see why that would be helpful, but i also would like to know which imbue would be best to get!

Also, i've never SP farmed, so if anyone has any suggestions on how to go about that, any suggestions would be appreciated! ^^

go on fire light ice.
sword or spear isn't so important, but ice and light you must have high and fire for nukes, too.

Sp calculator - use it to calculate how much sp ur gonna need

Sp farming -General faq for sro, just look at contents for sp farming. Provides a good explanation.

Good luck with the farming