I just started to paly arena(practice ATM) and want to know more about the pvp talent choices. I know these are changes from palyer to player but I've seen a lot of choices and I want to learn when i have no time to play it.

Nemesis-Fel Eruption
Chaos Blades-Fel Barrage (I do not feel demonic very good, but I've seen some ppl with it)
Demonic Origins-Awaken the Demon Within
Rain from Above-Detainment

I found RfA useful in 2v2 but in 3v3 Detainment might be better however I'm more interested in the experience of others about this, since it varies between matches.

I will play 3v3 seriously in last season, and I'm experiencing a lot ATM and want to know these things.