At 48%, with champs, it’s going to be 2 hits about 50% of the time. If my boost was any lower, I’d probably go with heavies because my fast would consistently take 3 hits to take out the AI light and heavy. The above AI lineup could be tackled with heavy+rogues. If less than 2 artillery, I use 1 heavy and 7 rogues. My general rule of thumb is with 2 or more artillery, I go with 1 fast, champ if possible, and 7 rogues. Even against Colonial and Industrial units, most of it is still useful.
The techniques outlined here will work for all battles LMA and lower.
My boost is 48/48 which is lower than the recommended amount for the age.