Ah, no. The Guard skill does up to four different things, which are represented by A, B, C, D in the table. It's meant to be a PC class, and if you look at what all the abilities to you'll see why. A buff that grants, in total, +200 hitpoints and +20 AC is nasty. Bonus feats like those of the fighter, less so.
I'll bold the ability titles, of course.