I find it interesting to note that Allomantic steel and Feruchemical bendalloy can make a Crasher-lite, though the benefit to your allomancy isn't nearly as strong and it sounds much more potentially uncomfortable to use it at extremes of storing and tapping.
It would be interesting if Feruchemical cadmium really did store up physical air instead of just "Breath." You could overtap and blow out a constant stream of air, while anchored to something yourself, to get some wind in the sails of the ship, too. Alas, I'm pretty sure that's not what it does. Feruchemical cadmium/Allomantic iron is fascinating, though.
Could Feruchemical cadmium help you adjust to different physical pressures better? Does it depend on how liberally you interpret "breath"?
Allomantic bendalloy/Feruchemical steel is just fun, of course. I wonder how the speeds and productivity they can achieve compares to Steel Compounders. For one thing, they can probably interact with physical objects on a smaller scale more easily than someone compounding steel to achieve the same level of speed.
Allomantic bendalloy bothers me from an economical standpoint. When you burn it to do more work in a shorter time- well, it doesn't make much sense for you to be paid by the hour, does it, and what employer would be willing to pay you based on "subjective" hours? I just get the impression that there's going to be an emotional/social pressure that makes it very difficult to capitalize on your ability to get more hours of work out of a day.
...is it strange that my first thought with Bendalloy's potential is to get excited about the idea of being able to work longer hours on a regular basis, aging myself in the process, and figuring out a way to get paid for the subjective hours? Even in a narrow, workplace context, the benefits of speeding up time can do better than that- providing perfect service in a restaurant by having a complex dish that takes time to cook prepared seconds after the customer finishes ordering, getting several hours of work done for school and still having time for rest and recreation and- hey. This is really unorthodox, but could you train your body to burn bendalloy instinctively while you sleep, the same way your body will do that with pewter? It sounds like an awful idea to try (is bendalloy toxic?) but if you can, then... but then, of course, we probably already have people with Slider friends making arrangements to use their time bubble to let them get a full-night's sleep in the middle of the work day at the same time the slider is using that time to do work of their own at an accelerated pace.
!!! Bingo, there's a business model. I guess the idea of charging others to join you in your time bubble is a little obvious, though.
There's so much potential with both of the new temporal metals, though. If Pulsers really can find a way to anchor their bubbles to the frames of ships and trains (so far WoB sounds like it's possible, but very finicky at best), they can dilate time to let those on long rides speed it up a little. Or they can help with food storage on long journeys, or even just working in place at a storage facility. And how many people would love to rent out a room with a Pulser and a Nicroburst and just skip forward a few weeks, months, or years?
Another idea for Sliders would be helping to get crops to grow a little faster, though that's probably hideously inefficient for its output, and I doubt the coverage of a Slider bubble combined with the dilation effect would let you get your money's worth out of having multiple Sliders double up on the effect or working in shifts to boost your crops' growth. And it would probably do screwy things to the plants' natural cycles in relation to the days and seasons anyway.
(On a tangent of a tangent, I'm all but convinced that the Atium-Cadmium alloy or the Atium-Bendalloy alloy will create a bubble of rewinding time.)
Back on topic, it's hard for me to choose between Feruchemical Copper and Feruchemical Zinc, boosted by Allomantic Bendalloy. I'd love to be an Analyst or a Flashwit.