I always fly Mods on (AI Mods + my own Albatros ones)...
Great achievement Fifi!
Albert Ball was my first ace kill ever.
I got him twice in Jasta 11 and 12 Campaigns (PWCG).
Both times I was flying Albatros D.III and he was flying his favourite Nieuport.
I've also got MvR when he was an aspiring Jasta 2 pilot with 8 air victories.
My most remembered (epic!) fight with an ace, was the one with a Camel ace once (Roderick Dallas?)...
The fight was a tide as we both scored hits on each other but no one could determine victory.
I tried to flee to my side of the line, damaged and he kept chasing me.
Being faster than my (undermodelled) Albatros D.Va he was able to catch me.
When he was closing at firing range, I turned to face him, we crossed swords and back to the chase again.
We did that numerous times before he "realized" he was running low on fuel (leaking)
and being over enemy territory he finally released me.
Anyway I got Billy Bishop again in another Campaign with Jasta 27 this time.
It's now July 1917 and he was flying a SE5.
From my experience, aces are not difficult to get, but you have to be decisive in the early stages of the fight.
Give them time and space and you're dead or crippled with their first chance of a snapshot.