Open to willing parties
Wilcar - The Love of still docked with her sky crystals in a warehouse at the docks. Wil would die before he abandoned her. If he manages to fight off the creatures there (although, again, sky crystals. Maybe will attrct them?). So he'll definitely be there. -1 for his few potions on hand to his damage, but +2 because well, he tanks and he won't back down. So he could use a little help.
Maria - is in the EKP and will be running right for the chaos if it starts. She's a balanced character who's best in between the tanks and the back row, healing and dealing out damage with her holy attacks. So she should reduce the damage rolls of whoever is in her party by 1 or 2. The difference will probably be in how large the party is - a larger party sans a healer will make it a 1 reduction because she needs to balance defending/healing and laying down some damage/status effects. 2 if it's a smaller party with more offensive capabilities and she falls to the back line.