well @ ulti: if the ottoman makes nothing but abus he wont stand a chance vs the cossacks no matter how many he can make lol.
but if he makes both it lasts too long to make an army that can stand up vs 9 cossacks ~33 strelets+ BH fire.
As Russia I actually wouldnt FF at all.
The disadvantages of a russian FF are big easpecially vs ottoman while there arent many advantages imo.
Simply stay in colonial till 10 mins in the game, MASS muskets/strelets and dont stop making vills.
Chop a lot of wood and get map control early on with your BHs.
Micro, make your musks melee the spahi while the strelets attack the jans and the 9 cossacks try to take out the 2 falcs.
Make your BHs fire at the abus.
I know its easier said than done but I beat a 2050 ottoman guy with that strat today ( he was lvl 95 ottomans)
so it cant be too bad.
He first rushed but my spammed strelets+ cossacks took his army out.
Then he FFed and I boomed a lil and massed musks.
I went to fortress a little later.
After that, he got stradiots ( he couldnt get spahi because I had map copntrol thanks to BHs) and they got owned by my muks while my cossacks meleed his falcs and my strelets killed his few jans. ( as I said, he had no food at all)
So the key is to raid the otto + to take map control (no food no spahi no jans=GG)+ to get a very good eco through making consantly vills.
Also never forget about making strelets/musks.
A otto FI is actually the worst thing for the russians but at that time I have total map control = no food= no jans.
The main problem are the bombars but through BH spamming I can buy some time to make culvs while booming.
(get another TC ASAP)