I'd play Mystakidis as the number #10. Even when he's having a bad game, he'll still generally manage to get into a few goal scoring situations. What he lacks in composure and "finesse" he makes up for with vigour and enthusiasm.
I'm almost at the point that I'd drop Biseswar completely if he doesn't get fit. Seriously his lack of fitness is ridiculous.
Pelkas needs a mentor. He's lost on the field a lot of the time. At least Mystakidis runs.