I finally managed to finish King's Ransom and I am preparing myself to do the Knights Waves Training Ground, so I was wondering if the set up I am thinking will work.

 

Rune Platebody and Platelegs, Regen Bracelet, Helm of Neizitnot, Ardy cape 1, Dragon Boots, Ddefender, glory, Ddagger (p++)* Abyssal whip a super set, some restores and monkfish for healing.

Sounds about right to me, maybe you should try using sharks instead? When I did those waves (Loooooooooong time ago) I think one of the knights gave me some trouble, but I don't remember my levels at that time.

 

Bring a shield just in case you're getting torn apart (Keep wielding defender, change to shield if you must)

Actually I borrowed a Zammy spear and made to the final knight on my second try, I just died cause I brought too many restores and not enough food, I'll try with sharks though.