Knights of Tezoth

One of the options was a male knight and 2 female assistants.

Would one of them be a tsundere, and the other a childhood friend?

But out of 5 training points, 2 go to others, leaving 3. So it turns out that either the knight doesn't master weapons, or can't ride, or doesn't wear armor, or he simply has nowhere to put his AP.

Check the option above. In theory, it should fit and you'll be able to play your harem story without any major problems.