It's hard to miss when it tracks the enemy if you just get the shot in their general area. I think it would sooner be blocked by the invincible blocking you're conceptualizing - which would work on the other two as well. Raze-Lighter could be used to take out shields or to force a blocking enemy to flinch for a regular swing, I suppose. Dark-Drinker's ability would be viable because if they block the first, they will be hit by the other swings when they flinch. It could also be used on multiple enemies. Bolt-Caster would kill both just because of the lingering storm it's ability creates upon impact. They would flinch from the disc and then die from not being able to get out of the storm. There's no debate to be had about it, just how it is based on the rules you laid out and what the weapons do. Ranged beats melee and Bolt-Caster both. Don't think I'm not for the idea of an all-sword match though! I think it's a great idea. Some of the best gaming times for me were in Halo turning up player speed, lowering gravity and health and then using nothing but the energy swords in a small map.

You handled that perfectly, great idea!