OK, I hate cluttering up the IC thread with OOC stuff, but hows this sound: If you use Listen as a partial action (can take place of a Move or a Standard), I'll let you listen all round (Both your turn and his), meaning if you hear him on YOUR turn, you can take the 2 actions, and if not you can smack him with your readied action but not go invisible. Sound fair?
(Never let it be said I'm not open to compromise.
It may sometimes be true, but never let it be said anyways..

)
In other news, we're waiting on... OH, me. ok, Update:
IC:
Room A - Corlon listens intently, trying to find his invisible opponent, but doesn't hear anything for a few seconds, until he hears some low chanting off to the side. Turning quickly he flings his firebolts, and 1 of them hits what is (Assumedly) the caster, while the others splatter against walls, leaving more scorch marks. The Cleric groans in pain but manages to finish his chant, though nothing seems to happen... It dawns on Corlon that his opponent may be either healing himself or improving his own abilities.
Room B - Astaldo fires 3 arrows at the Celestial, stepping backwards as he does so, 2 of the arros slice across the mans flesh, drawing blood, and the 3rd flies mere inches to the side, narrowly missing its wings. wincing, the angel clasps his sword and concentrates for a second, his form suddenly becoming blurry before he steps forward to again get into melee range.
Room D - Uvaka, apparently attempting to make up for his recent ineptness, unleashes a flurry of devastating strikes, inflicting multiple bloody wounds on the Dragons hide. Hissing in pain, the dragon swnigs with both its claws, but both are deflected, unfortunately Uvaka is somewhat distracted by them, and is unable to avoid the dragons mouth as it bites down hard (20 damage) and then with a mighty flap of its powerful wings, heads into the air, flying upwards into the darkness and chuckling as it shakes its unfortunate victim around.
(OOC: You can attack from this position, OR try to get out. If you attack you're at -4 to hit b/c of the awkward positioning, but if you break free you may fall onto the floor, now about 70-80' below you.)
You have No more Increased Multiplier, or Ki Damage, all used up (Rather effectively, though.. 2 max damage criticals can be painful.)