This information was gathered by using your troop setups in
Asipak's onlin combat simulator
Block (A+B) on the camp to the left of WT2
The 1r block influences the following round block since it kills 1 cultist.
So the block 1r followed by 99E 93C 8A on the camp to the left of WT2 will result in
link to simulator result
Open the spoiler for an explanation of the graph (in order of block duration):
Block (C) on the camp to the right of WT2
1B 129C 70C
link to simulator
Open the spoiler for an explanation of the graph (in order of block duration):
So in worst case scenario both blocks only last 80s.
Veteran on WT2
40R 125B 1LB 1A 83K (takes 50 to 70s for a veteran general)
link to simulator, this shows the destruction time as well (scroll down)
So in worst case scenario the veteran only has 10s of walking time after block B starts his fight (since you said the veteran needs 40s of walking, this will fail)
Major on WT2
108R 52B 1LB 1A 108K (takes 50 to 90s for a major general)
link to simulator, this shows the destruction time as well (scroll down)
So in worst case scenario the veteran should start his fight 10 seconds before block B starts his fight (impossible)
There is also tiny chance to lose cannoneers
Conclusion
I do agree it is very likely the blocks will work, but there is a small (tiny) chance it will fail