Why so many scouts by that point and time? I think the Advent player had the superior fleet there, but like you said, he was outnumbered. I don't really understand why he had 20 scouts though, nor why he had so few Illums...
AI doesnt know/care that illum ownz, he prefers diciples/scouts

on average i'd say, you've got a nice fleet
as advice on how to improve it for online (and even singleplayer) games:
CAP SHIPSCapital ships are the most powerfull ship avaible
with their superior abilities. high health/shields and high damage they win from any frigate/cruiser 1 on 1 (you can make that 5 on 1 btw

)
however building one is costtly, takes time, and even more time to bring one to the field and gain levels.
for this Capital ships are used not as a weaopon platform, but as a support ship.
this means that you do not use capital ships as your main weaopons, they are strong yes.. but start calculating cost/upkeep cost etc.etc compared to what you could have bought with it.... its just not worth it
its abilities however are monstrously strong, especialy on high levels...
having alot of capital ships wil spread experience, thus lowering the pace in wich your cap ships level, thus making them weaker
in most of my games i make it to about 2/3 cap ships supporting a huge fleet made up of carriers/flak/LRF/HC/over 30% utility/clas 1 friagtes/ and in special (racial) occasions Repair cruisers...
this fleet under the influence of 2/3 cap ships easily wins a fleet made up of alot of capital ships
Cap ships are strong, but useless without ALOT of friendly ships where they can use their helpfull abilites onto
(every cap ship does something unique that helps the fleet in some way, to much capitals wil only reduce the effetiveness of those abilities
FRIGATES And CRUISERSeasier to explain, they're soft lil ships that feed upon the abilities of a capital ship,thus making themselves stronger. without a capital ship frigates or cruisers are alot less powerfull, so defend you cap ship!!! even if it means sacrificing cruisers/ frigates
some cruisers give aditional aid, repair/longer range,accuracy etc. these are a nice addon for mid to late games,
most frigates/cruisers are meant purely for damage,
Heavy Cruisers are the ultimate damage doërs in short range,
whilst LRF's do high damage from longer ranges,
having a few of both (50 / 50) = stronger then 100% cruiser or 100% LRF
this doesnt count in the ammount of ships!!! calculate the cost + build time!!!
so all this together (finally)
Cap ships are Badass
Support ships, dont mass em.
Frigates and Cruisers are Badass
damage doërs that, when upgraded have some pretty neat tricks (mostly the more ships the more powerfull the trick becomes) they dont even get close to a well used cap ship ability tough...