Bant Tempo Stomp

The goal of this deck is to eliminate and stall threats so my big swingers can get in for big damage. I am looking for all suggestions, but mainly for the sideboard. I have farseek, loxodon smiter, and spell rupture in the event I come up against a late game control deck (these would help speed my aggro up and deal with their answers). Det sphere helps deal with weenie and token decks, effectively shutting them down. Sleep is there in the event my opponent benefits too much from my returning their cards. The diggers cage is there to stop jund zombies (seems to be very popular post rotation) and snapcaster combos. Please give me any suggestions, thanks.