I've always liked the concept of using sorcery to enhance one's abilities while sword-fighting. For instance, increasing speed, casting waves of fire with the sword, making the sword cut through anything, etc.
But, if someone focused on learning just sorcery instead of both sorcery and sword-fighting, he/she will be able to learn more and therefore cast more powerful spells which will allow him/her to defeat enemies without the risk of being in a close quarters situation.
Obviously, using "utility sorcery" instead of "combat sorcery" can be very helpful in some situations. For instance, if you are an assassin and use sorcery to see in the dark, hide in the shadows, decrease your body temperature, etc. But I am thinking exclusively in sorcery used for combat, for instance, elite soldiers that know how to use sorcery to enhance their combat abilities.
So my question is, what are the benefits (if any) of learning both sword-fighting and combat sorcery instead of just focusing on sorcery?
EDIT: I'm going to try to be more specific:
I'm looking for benefits during combat only. Intimidation or any other uses outside combat are not considered.
Let's assume that magic is an infinite resource, only limited by the user's stamina (so basically, using magic makes the user get tired, like fighting with a sword)
- Lets also assume that magic is powerful enough to kill someone instantly (incinerating the target or whatever).
- I'm not looking for an excuse about why one specific character knows both arts, I'm looking for a general reason of why it is better or worse in combat than learning just sorcery.