In Suprise Attack block 3 camp 12 can be skipped and camp 11 blocked instead, this saves 17R 25M (camp 11 100Hk, 100WK - blocking with 128C 70ES 2 XB) Basing on positions I'm showing on screen bellow non of generals is intercepted by camp 12 because walking path is on the edge of camp 12 influence area, not even veteran since he is entering leader camp from SE side not SW.
I've confirmed it in 2 steps:
1) Destroyed camp 11 and used combat preview on camps 13 and 14, it showed no interceptions, finished with double block on 13 and 14.
2) Blocked 11, 13, 14 from positions on screen.
Positions are fool-proof there is at least 4-6 seconds gap on entering to interception area, there is plenty of time for block so its not a problem here.
Starting obviously from the closest to the furthest, as I've said above it can be done with lollipop in one hand and coke in other.
Additionally i would reconsider last block to be double not triple (only camps 17 and 19 blocked):
1) You are using way to much of high value units ~300ES ~300S ~200 XB which is like 4,5k gc value.
2) Jumping and lag can end up in 2 or 3 days in rebuilding queue and at this final block its even more noticeable due to ls buyer.