I had one give out 129 merits, this was a foreign power ship that was wanted and had a bounty, a fun fight too.
Addendum: some times it is the eagles with rail guns, and vipers with plasma accelerators that pay the big merits, not always the anaconda's and pythons, I'm glad about this as they often take more work to kill; I'm using fixed hard points though.
It's purely based on combat rank and any bounties they have
The ship they are in is irrelevant
Currently the most combat merits is SLFs at enemy power carriers
They are all elite
So they all give 71 merits each with combat ethos
And boy is there a lot of them
And please god don't nerf it, it's still plenty worse than rares and a lot of work to get good numbers
Just add a modifier for the ship they are in so the condas are worth the time to kill, because they typically are not.
And the condas in signals with decent rank are stacked with mrps so shooting out their pp or fsd is quite the chore, and often impossible before they jump out