IceBear said:
But, the amount of time that the above situation would occur would be low and thus I couldn't care less one way or the other. Normally, it's one Concentration check per damaging attack. If you feel that the three sword blows consitutes one damaging attack then use the one roll.
IceBear
Agreed - that's my point - you need to decide, essentially, if the mage has time to shake off one blow before the next one comes, or if they all come so close together that he does not have time to shake off each one before the next one hits.
You can rule either way with the rules as written.
One way you make multiple concentration checks.
The other you add up all the damage done from readied actions or AoOs and add them together for one check. About the same amount of effort from the group, I think.
(As an aside - I'd handle readied actions and AoOs seperately - readied actions, if successful prevent the AoOs from even happening.)
It also partly come down to whether you think it should be easy or hard for mages to cast spells when in combat.
Easy = multiple rolls against each damage roll.
Hard = one roll against damage total.
Choose your philosophy and run with it!