Don't sell yourself short.

[He pauses for a moment to appreciate such a horrible turn of phase. Short. Ha. Because giants are so much taller and...anyway...]

Giants also tend to be slow, but I'm sure whatever classes they have here are tailored around what we have to deal with in Asgard.

I can't say for certain. I'm no fighter, so I haven't bothered to look in on the classes. Maybe ask Arthur.