@speedydust
I did it succesfully. Have you noticed any lag? Have you sent the attacks in the right order?? (camp from the back meaning one in G3 position blocks camp 3, camp in G2 position blocks camp 4 and camp/-s in G1+G1* position attacks camp 5) Also remembered not to send them one after another but to wait till each general reaches that particular position on the map
Maybe you should try killing one camp (camp 3) and try blocking only the other (camp 4) untill you feel secure enough on yourself to try double-blocking on this particular adventure. Thats what I did couple of times (see picture) before I tried (and succeeded) the doubles.