So im a white knight should i be maxing combat orders?

Charge Blow and HP Boost are the only skills that really need to be maxed - Charge Blow because it's a prereq for Advanced Charge Blow, which cannot be met by CO, and HP Boost because if CO runs out, your HP ends up inverted, and next time you cast CO it actually decreases HP.

Any other 1st-3rd job skill can safely be left at -2 from max, and CO used to max it out. You always want CO active anyway, since it provides a big damage boost all around.