VP is easy. While you need special goods from AF and OF to complete tech, VF doesn’t have its own special good so you get a break there.
Fighting. Ronin Bots and the Artillery Unit. I do a lot of GBG and my setup was 6 artillery and 2 ronin bots. There are no flying units so artillery rules in VF. This was the first age I used no rogues. At first I had an artillery and a ronin bot barracks but when I got 1500 ronin bots I deleted the ronin bot barracks and only made artillery. that was my setup but also try 6 artillery or 4 artillery and 4 rogues. The only unit that gives artillery a battle are ninja.