armadiLLo is the most usefuL virus...
it nuLifies enemy's attack whiLe attacking...
i use it for aLL LeveL and aLmost aLL battLe...
most of the LvL 4 battLe are easy...
ony got few hard...
i guess if you have the Luck you wiLL pass through...
ps: i use armadiLLo with some other supporting attack virus to win.
worked hundreds of times ^.^