Steel Legion does address the "metallizing organs kills them problem... It seems fine, except it doesn't need the chest port because that aspect of the Iron Legion was given to the Baseline.
If we're going to make a Jackdaw out of a shrunken Magpie, we should make it a Raider upgrade instead, because Magpies are supersized Raiders to begin with. It should probably run on a Bio-Paste Reactor, and can host two powered-up Teslas like the Glaive has on its small turret. It could have Red Sky or Storm missiles, but I don't think it needs to do everything the original Magpie specs called for. Heavier armor or an armored plow would be more useful.
I don't think we're getting teleporting time assassins on a revision.
Electro-Boost Ramjet
Built around a Tesla firing rod, and lined with electromagnetic coils, the Electro-Booster Ramjet is incapable of firing 'true' Tesla shots due to the constant suction pulling air away from the rod, but the rod is able to prime that sucked away air and turn it into the same electically active plasma that a Tesla charges to fire its shots. That plasma responds to the electromagnetic field established by the coils and is pushed out at such speeds, the engine provides tremendous thrust in exchange for electricity and air. Fitting onto Torches is a high priority, as the lack of oxygen in the upper atmosphere will not hinder an Electro-Boost Ramjet the way it does combustion engines, giving Torches a place of safety in the skies.
Malign Revelation
The pieces of that so-called cannon, the "Malign Intent". Our... sane... engineers tried so hard to make sense of them. There was no barrel, no loading mechanism, not even any connectors to hold the pieces together. And yet its creator swore, to the day we condemned him to the Refinery, that we just couldn't see the cannon, that it wasn't done. We can see it now, from the Black Chamber, and the connections that tie it to those parts. Brought back to the original construction site and set in place, the bits and pieces of nothing stuck, right in the air, and revealed their purpose as anchors to our world. Given power, what would have rivaled the entire output of all Aratam's power plants when the cannon was designed, we brought it through, gave it form. This still was not enough to manifest it for more than a few moments, but then we metallicly recombinated that cannon-shaped piece of the Astral and bound it between our worlds forever.
It is one of a kind, and not exactly what anyone, even the mad engineer, intended, but it is powerful. It fires Astral shells in a closed loop, using the death created by them to restore its supply. Further study to replicate the processes used to create the cannon and the anchors to bring it to our world will of course be necessary, but as the engineer said, the cannon is starving and must be used as soon as is possible on the field of battle.
The loss of its creator is an enormous setback, but surely one we can overcome with time. They will be recognized posthumously as one of Aratam's greatest thinkers, a martyr to their work.