Charlie.x.3000

Personally, Allomancy seems to be the best. Because this is our world, no one knows about Soothing or Rioting. You could easily achieve many things you want to by getting others to do it. You just have to be like Breeze, nice and gentle Soothing and Rioting. You want to do something fast? Bendalloy, lots of it. Iron and Steel have a generally limited use if you are trying to remain hidden and not become a soldier or something.

I'm theorizing that all Epics have their own abilities as a 'weakness'. That is, all harm done by their own power wouldn't be able to regenerate or reincarnated from. This would explain why Tavi could negate Prof's powers, but not a 'negation' as a true weakness would.

I feel like his "fading" was of his own doing and not because he was confronted with his weakness.

I think he specifically gave Megan the second highest rank in his organization/city because... Firefight would trigger Steelheart's weakness super easily. Just as she turned Limelight's forcefields on himself, she could turn Steelheart's energy blasts around. And since those energy blasts come from Steelheart and not Firefight... RIP Steelheart. After all, unless Megan just reincarnated, her powers aren't very strong. So for her to reach such a high rank must be because she is basically the one Epic that can easily kill Steelheart.

Hmm I didn't consider that Scadrial was made by the Shards, however, I would still contend that Sel, and perhaps Roshar are more 'invested' because the shards were shattered. But I still don't think a Tenth order Awakened person with Nightblood/Nightbloodian weapons and armor could win against a Nicrosil compounding Fullborn, (considering that you could just compound so much that you became a shard, but then we have that problem of vaporizing like Vin did).

Who said you needed to swallow the nicrosil? Just shave off the steel bits of the speed metalmind and burn those.

Would the AonDor/Dor count as one magic system or multiple? Because the source of power is the same, you just channel the power in different ways.

Many of the things you talk about could perhaps go even or beat a Mistborn, but against a Full Twinborn that is compounding Steel, Nicrosil, etc, they wouldn't stand a chance. Nightblood may be stonger, but all you really have to do is not get hit, which is easy for a Steel compounder. Besides, A. Nicrosil might even be able to sap the Investiture from Nightblood. But the important thing is because Preservation and Ruin are not shattered, Scadrial is overall less invested than Roshar and Sel, yet Scadrial's magic system produces stronger abilities than the other systems.

I find it ironic that, Scadrial, the most uninvested Shardworld we have seen, has the most powerful abilities. (Steel Compounding, Mistborn with F. Nicrosil compounding Nicrosil, etc). While Scadrial doesn't have true immortality, the abilities themselves are extremely strong. Perhaps this is because Preservation and Ruin actually created the humans on Scadrial, allowing the interactions with Allomancy and Fuerichemy?

Technically, anything below Potassium "explodes" in water, and I highly doubt Ettmetal is Cesium, considering Cesium burns upon contact with water vapour in the air. I think potential candidates are Potassium or Sodium. These two due to their abundance in the crust. (The flying pontoons had a lot of the Ettmetal in them)

Can a allomancer burn one of those medallions for enhanced tapping? Seems like it should be able to work. So you could use a medallion that granted say A. Steel, and eat a speed medallion for more speed than was stored?

If we are talking about Vasher at maximum potential, what about TLR? Let's pit TLR during his Ascension (When he held Preservation) against Vasher with all his breaths and Nightblood. I'm 99.9999999% sure TLR would win.

Granted: You get left behind as a bridgeman. I wish for the ability to create world peace.

You have the Sword of Gryfindor - piercing your chest. I wish for a bane that is also a boon.

Granted. It's available, but you can't find any of the knowledge. (Think massive library where knowledge is available, but all the books are just there randomly). I wish for RNG to always generate the option I want.