http://www.youtube.com/watch?v=mNtG9iVfuHwthis is pretty much the full arc bible, it's from the previous version of the game so damage values may be a little higher and some of the combos may not be applicable to the newer game but for the most part it's still very good
some problems with the other video linked in here, for some reason the player leaves out 5B in the ground string, which adds a couple hundred extra damage and meter and does not increase the difficulty at all, it's kinda useful as a starting point but for reference it's not great
i.e. that video has
2A2B2C 236A 5B 623B j.C JC j.B j.C AT = 4206 at 59.4% meter gain
but if we just add 5B and the initial j.B
2A 5B 2B 2C 236A 5B 623B j.B j.C JC j.B j.C AT = 4710 and 71% meter on the same character
this a pretty significant difference for very little extra work (though on some characters it's much easier to leave out the initial j.B)
also not featured are the very easy corner carry combos, which trade off Arc's very nice damage for decent corner carry.
The easiest universal one is
2A 5B 2B 2C 214B~C [command airdash] j.B j.C JC j.B j.C AT/j.2CComparatively low damage, but it will carry the opponent to the corner from most of the screen. To activate the command airdash just hit C after the 214B~C followup, Arc will take to the skies after the airborne opponent. (I don't know a right way to put the command airdash into notation, anyone have suggestions)?
Not universal combo is
2A 5B 2B 2C 236A 623A OTG 214B~C [command airdash] j.B j.C JC j.B j.C AT/j.2CSlightly higher damage (though still below most of her other combos) and slightly better corner carry and meter gain. The 2144B~C OTG will not work/is stupidly hard on Sion, Akiha, S.Akiha, Len, White Len, Ryougi, and Nanaya.
you can also do this same combo after a connected j.2B (j.2B 623A OTG whatever)
on opponents who you can do 214B~C OTG on you could always do
j.2B/6C 623A OTG 214B~B JC j.B j.C ATthis does shite damage but it's the best way I know of to combo the above charas midscreen without meter, although OTG 236C is very good and should be used whenever possible imo
easy midscreen max mode combo, it's very easy and looks cool/does damage
2A 5B 2B 2C 236A 623A IH 2C 236B 623B j.B j.C JC j.A j.B j.C AT/j.2CI'd like to post some 623A 5A link corner loop combos right now but they're pretty character specific and I'm trying to work out the best sequences and enders but if you're just starting you probably don't need them
One last point for new Farc players, counter hit is super fun in this game, if you CH a grounded opponent with 236B or 236A from max-ish range you can just dash in and 5B jump cancel aircombo them, it's even possible to dash in and hit them with 5B 2C 236B 623B aircombo from max range, you just need to be very close when the initial 5B hits. This is big, easy damage, don't forget to practice these!