Main Weapon - If you have 90-95 you're definately good to go. Anything higher than that is great, a little lower than that not a big problem.
Shielding - 85 -90 would be a good place to be, a little lower not a big problem either. Again anything higher is great. Hunting solo you'll be using it a lot, especially when testing out new areas to see if theyre good hunting grounds for you. Once you feel comfortable in a hunting area then youll probably use it less but shouldn't be overlooked
Magic - This ones a kind of what you have is what you have. Unless you've been specifically training it will probably be around 7-8 at level 100 which is fine. It doesn't make too much difference on the spells you cast, especially the combat ones. Just keep healing with spells and chugging the mana on profit hunts (or all the time hunting if you have a bit of money) and youll be where you need to be.
If you've been playing normally and levelling solo the above is applicable
If your Knight has been sitting in the training room unused for 7 years, well whatever skills you have should definately be okay.