Witch of the Swamp Block

Several guides I have seen show a 1 recruit block on the bandit camp in the NW corner while attacking the leader camp just SE of there. I have not been able to get the block to work as the bandit camp defeats the 1 recruit before the 2nd general can get to the leader camp, thus intercepting the 2nd general. I've tried adding 5 bowmen and a militia to try to lengthen their battle to no avail.

Anyone have something that works?

http://imageshack.us/a/img407/3562/witch1.png
(If you believe in Elite blocking -- use 52E 1S)

http://imageshack.us/a/img22/2962/witch2.png

http://imageshack.us/a/img803/3323/wotsdouble.png
The 10E 170C block -- although the sim says is safe -- can lose in 5 rounds and fail (have proof)