I will say "YES" and there its the reason:
As a Knight you can use exura ico and a spell like exori, exori min, exori gran at the same time, and ok, you are not going to attack more with the magic lvl but you are going to improve your heal, and if you are a good ek you are going to use it a lot in this way:
Exura ico + Great/Ultimate Healing Pot in a solo hunt
Exura ico + Great/Ultimate/Suprem Healing Pot + Sio in a party hunt
In my case at Ek lvl 580 I can heal 200 - 260 with a exura ico and that extra heal will help a lot, I hunt in fire library since lvl 500 with my falcon coif with magic lvl doing that :p .
And if you are a low lvl knight with ml 10 and for example, 20% of bonus with loyalty, check this:
You are going to use : 338 training wands
and you are going to spend: 93 hrs , 53 mins and 20 secs (in a X2 exp and private dummy)
to get ml 11