Taking into consideration that I don't produce trap, but I know that the kick used in trap music is very "bassy", I think the best option is to use sidechain with the kick and sub, so they don't clash on the lower end of the frequency spectrum. I'd also see if it's necessary to use it between the kick and bass, and snare/bass/pads/leads. sidechain can be used for both cleaning up the mix and for creative reasons as well.