well yeah if you use all tourney sagitarius you will win but then your opponent will beat you unconcious with the rulebook
This may be predictable, but I suggest (yes thats right folks you guessed it...)
CHRONOS FRIGATES!!!! YAAAAAAY!!!! Ahem...
Seriusly though, dont know about 10 point battle but at 5 pt battle Ive had good results against the centauri with 1 Warlock, 1 Apollo, 3 Chronos and a Delphi.
For 10 pt Battle I would suggest maybe that, plus another apollo, an Omega 5 more chronos and a second Delphi. You will likely lose a few 1 or 2 Chronos (maybe 3) to beams before they can get behind the centauri main lines but once they do they can inflict some nasty damage. Centauri ships main weakness is that once you get out of their front arcs they tend to have little or no firepower beyond 8". So once your Chronos get past that point they can maneuver to stay between 9 and 12 inches away behind or on the flanks and blast away with their turreted weaponry.
If your opponent shoots at your bigger ships initially so much the better as they will take the punishment and keep the Chronos alive (and if not then you have some formiddable fire support) try to use the scouts to redirect fire for the Omega (and more importanlty the Warlock's) boresighted weapons to infinlict maximum damage on the medium to larger centauri ships. Use the Apollos to either blow smaller ships right out of space or focus their fire on the biggest target on the table (Primus, Secundus, Ocuturion etc) and try to cripple it with critical effects.
This particular fight is one Ive come to know rather well as my most regular opponent has been centauri (and I for the most part play EA though Ive played other races against them too) and Im fortunate to have very good player as the centauri which has forced me to raise my standard of play and learn alot of tricks to use against them
Hope this helps!