the finishers im focusing on after clearing the neck atm are the gogoplata after you zombie the defending arm (as if you going for a sorcerer), then using your elbow to keep the defending arm trapped but pushing the palm of that hand into your heel to finish the choke.
also, i was toying around with the monoplata and i think i found a way to use it on the bottom, by getting elbow control with the arm on the same side your attacking, and then squeezing your knees together to apply pressure.