Revised Post Original Below
So I have gotten more accurate stats from a recent battle. The Mythical Heat sword does 40-60 damage, +45 heat, and -3 Heat Resistance. The Physical Damage sword does 70-120 damage, and -3 physical resistance. Not the massive 200 I thought before but not the wet noodle everyone tried to convince me it was. 45 heat will burn through the highest heat mod and 7 hits will overheat the highest heat body and 5 of the best heat mods. Not to mention both of these swords get stronger each hit. Not once have I fought someone with one of these swords and stood anywhere near a chance. You'll find a comment below defending Mythical items saying that you can win with intensely slim odds.
When a weapon makes strategy useless in a strategy game maybe the weapon needs fixing.

Original
WARNING: Since mythical weapons cannot be viewed in the shop all stats are a rough estimate based on my personal robot's heat, energy, resistance, and health. No stats are 100% accurate.
So I know Mythical weapons are suppose to be super strong. BUT, When the sword does Nearly 200 and a massive amount of heat damage crippling your robot so you can't counter or use a health kit maybe it's a bit Over Powered.
You could argue "It's a sword it's got a limited range" and that's true but there are 3 specials to get you closer to your opponent 2 of those can get you within sword distance every time.
My main strategy is to push people back and use long range but with a Mythical sword I can't get a turn in to use any of my weapons.
Solution
The Mythical sword would be a lot easier to handle if it did electric damage that way SOME of your weapons worked so you could stand a chance.

Ummmmm what are you talking about? Justice mark one does 76-120 damage i think, and it does no heat. The heat sword doesnt do 200 damage. There are three known mythical swords, one for each type.

After awhile you get used to playing mythical users/abusers, its a part of the game. Also its not like its IMPOSSIBLE to beat someone using a mythical, ive done it a few times with build similar to the one Nic used to use (Demo3, sure shot, anti material, yellow beam, you get the point). Although i have about a 90% chance of losing to someone using a myth, its still possible to beat them without kits.

Just because someone is using a myth doesnt mean theyre a good player, there are loads of people who have myths but arent rank1. You just have to know how to work with what you got

I couldn't reference the exact stats because you can't view mythical weapons in the shop.

My General point was that being hit twice and losing the match makes the game unfun and almost unplayable.

Losing because you weren't as good as someone is fun and challenge. Losing because of some unbalanced super weapon that you can only beat if you also have said unbalanced super weapon is annoying and frustrating.

I feel like with your tendency to exaggerate, you aren't losing because your opponent has mythical weapons. Your suggestions would present much better if you sounded at all credible.

The mythical heat sword does 40-60 damage. The mythical physical sword does 76-120 damage, which isn't all that much higher than the epic physical sword, isn't even close to 200 damage like you claimed and doesn't do any heat damage.

awww where is that sword
Are you played any other game.. umm sorry just kidding but there is nothing exits like that

any way even normal Call Of Lightning can go up to 69-99 + 50

because of -3 resistant drain mythical energy sword can go only 40-60 + 45 maximum if the other player does not have any energy.