It's not Phantasia without a big ass sword called "Attacker".

But the name 'Phalanx' is usually to be used for a defensive move.

To answer the question posed by the image, I'm personally not a fan of the "change equipment during battle" because it tends to be either tedious to manage or useless. What I prefer is when you "equip" a couple weapons before a battle (say 2-4) that you use during battle as alternatives for your Attack command (so you may have a Short Sword and Long Sword commands rather than Attack). This setup allows a game to more greatly differentiate weapons while not being tedious for the player to take advantage of that differentiation.

That's just my opinion though. I could see someone arguing the opposite, in that having to setup multiple weapon slots is itself tedious and they would rather only take the effort when the need arises in a battle itself.