well, if u use one nuke, it should be anough, as the nuke destroys itself on contact with the target, so just use one, if it doesnt work, ill revise my strats too and tell me
its slow. in close range its useless,i never seem to use it but my friend produced a railroad cannon once and it didn't end well for it (died to a flame tank).so i say it isn't worth it to get a railroad cannon