i also like mono for rigger rods , i run 15lb maxima on all my rigger rods and even use it for leaders on my cores from time to time,i use walker releases on my riggers
also ive heard of useing braid for a deep rigger , but i see no need for it even with big paddles becouse ive lost very few fish doing this, but this is only my 2 cents and if braid works for you dont change , just keep catching fish.