I found that under patch.pack /db/campaign_variables_tables/campaign_variables
autoresolve_advantage_over_enemy_wipeout_threshold 0.8 original,
when i change to 0.6, i still lose vs AI with equal forces, but the scale is more even,
and if i have 3 times as many troops, - i wipe out enemy even on the field.
I have also become convinced that the lr (long range) suffix on sloops, 5th rates and some other, has to go on auto-resolve,
or the result becomes unbearable, where my heavy ship of the line rout in horror from sloops,
located under patch2.pack/db/unit_stats_naval_tables_naval/unit_stats_naval.
I also made gunnery better on a falling scale that favor heavier ships, for more expected results,
with the rationale beside gameplay being that a heavy ship roll less and as such is more accurate especially at range.
There can be no doubt that a 30-50-fold multiplier factor on the amount of research it takes to finally build a 1st rate,
should be directly translated into a 30-50 times superiority over a sloop or 6th rate.
Lastly i found that dragoons rulez in autoresolve, they are better than line infantry, and light dragoons are better still.
Or at least the Swedish dragoons are, being larger than normal dragoon units