Knightfall
World of Kulan DM
The characters are only dazed for 1 round.So we have many, many rounds where we can’t act? Are you going to roll strength damage and rounds affected or should we do it each individually ?
The weakened effect lasts 5 rounds. So, while Vitus can't act in this round (rnd. 8), he can act in a weakened state in the rounds after he comes out of being dazed.
If he must attack with a melee weapon, he simply does so at a -4 to hit. Plus, you must apply any negative values due to temporary Strength loss. For Vitus, he would be at -3 to his damage with any weapons that require Strength, instead of +1.
(BTW, your character sheet doesn't list Vitus's feats or any of his equipment. I need you to update that as soon as you can.)
I do see he has a crossbow, so he can use that without any worry of the Strength reduction.