It's also good to remember that in the 1600-1800s, the worst enemy of line of large, heavily equipped ships was the small 4-gun brig.
Anyway, I used to light sloop solo in SvS but nowadays with the extra boosts to upgraded broadsides and the loss of the "wheel-taking boost" it's kinda obsolete to go out in one by yourself.
I've always argued that the light sloop has been a hit-and-run instrument and never really meant to go against any big ship by itself. After Ship Customization came out, dealing with those tough copperhead war frigates in solo sloops always involved approaching them in the opposite direction that they were moving (to avoid their broadsides locking), throwing an iron-priming-boosted explosive, running, and repeating. It eventually worked so well that I was able to lower my Take Cover skill to 2, but unfortunately there really wasn't much use in it other than that.
A light sloop with a gunner is a different story however.. although SC made it harder to run, simply turning 10-degrees to the side after an enemy broadside approaches usually puts it out of harm's way and non-experienced gunners usually have a hard time hitting it.