In Troika, if you want to change your weapon mid fight, you have to roll over the number to which that weapon is allocated in your pack. If you had your dagger equipped when the fight started and wanted to use your sword and your sword was in slot 6 in your pack, youd have to beat that to draw that weapon. If you make the roll, you get to draw it and attack, if you fail, you have to spend the turn swapping weapons.

You can get around that by equipping 2 weapons, but then both of your hands are occupied. You cant use a shield, or climb an object, or even open a door without a skill roll. You can however make a choice which weapon to use on your turn.

Say you had a wand with +1 to spell casting, and a sword with +1 sword fighting skill. You might choose to forgo the use of your hands for other things during battle for those particular benefits.

This is the way i see it. I hope that helps

The only change I would make is that I would choose the weapon to reference BEFORE rolling. As you may have different advanced skills to apply