light sentinel and offensive sentinel

whats better? what gives more exp? when do u you use it?

I normally set up with a turret first, then a battle sent (the gold dome) to protect me from the small monsters and help with the big ones, and then a defensive sent for additional firepower and damage.

I don't pay much attention to the xp given by the sents, tho.

In terms of which is better, the battle sent will always be better as it gives you more points and xp. Then lightening and then defensive.

What's real nice about the battle sent is while you are linking someone's turret, you are also collecting points, adren, and xp from the battle sent that you have set up.

offensive sentinel lasts longer and is targeted less often.
The lightning sent is more likely to finish off already damaged monsters.