Fighting a close-ranged battle?
Speaking of which, the Summoner's common weapon of choice, the Wand, had a very high attack speed, usually having a rating of around 9 to 10. Because of this, there had even been some Wand users among Battle Mage players, focusing their playstyle on their magic abilities. When it came to Summoners, their close-ranged fighting power was pretty much close to zero. If they relied on themselves to fight in close quarters, all they had was their low-level knock-up skill, Thorn, which any Mage had access to, and Lash, which was mainly used to buff summons. Evidently, just these two skills weren't enough.
As such, some Summoners would opt to learn some of the Battle Mage's initial skills, like Dragon Tooth, Falling Flower Palm, Circle Swing, all of which were very popular. This would let the Summoner have at least some capability of defending themselves in an unexpected close-ranged battle.