over 20% chance for fail with your setup
0,7% is nothing, 7/1000 very rare and problem can have only player with 4 mma if you don't want take 0,7% risk use only 1 mma.
maybe i can improve setup. first i was made for 3mma and later i was added another mma and it' was late i don't change setup.
don't try, not enought time block will fail, also is not possible send 2 general if you do 1R block. you can save 10R, not worth to risk because of 10R
his setup has over 20% chance to fail
use my setup, if 7/1000 situations is to much for risk for you. use only 1 mma on second wt and avoid any risk.
block is safe if you use only 1 MMA