PoE Crackling Lance, Aegis Aurora, Templar, Lightning builds

I'm going to do some party play with my friends who just want to chill together. We aren't doing anything too juiced but I thought it would be nice if our builds meshed well together at least a little bit. The main idea for my build was a lightning/cold crit character that inflicts max brittle and shock to help everyone out. Here is the build I need help with making it make more sense. Mainly the belt and rings kinda suck. I also don't really want to use ashes but the reservation is just way too good. Also also I don't know if the lack of move/cast speed will feel bad. [