Is it at all possible to outfit a (relatively) small IG Regiment with Power Armor on par with the ones the Echlisiarchy...

Is it at all possible to outfit a (relatively) small IG Regiment with Power Armor on par with the ones the Echlisiarchy and Inquisition use?

Or is that dumb by even 40k standard?

Dumb even by 40k standards, yes. IG, even the better regiments, aren't worth shit.

Yes

They call it the Sisters of Battle

Pretty dumb. At that point they would have to be important enough to not die, and at that point they're probably an Inquisitor Retinue

This.

Closest second would be Tempestus Scions, since they have pimp carapace armor with cool helmets. Not powered, but still better than your standard IG t-shirt.

No. The equipment used by those organizations is close to the very best that the Imperium can produce. Even if the Munitorum could get it's hands on the schematics they wouldn't issue them to front line soldiers. The main idea of The Guard is as much firepower for as little cost as possible. There's the Ordo Tempestus but they're still far cheaper to produce than sisters of battle

On very specific types of circumstances, like that one planet that was composed entierly of nobles do I see it feasable. A bunch of rich shits who are wealthy enough that every family can afford to give their firstborn a dented up set of Mk IV or III. Due to their status as nobles however, I can't imagine that they'd be the most disciplined lot.

Only good thing about IG is cheap numbers. Why would you want to throw it away?

It wouldn't even be a Regiment, but yeah. A real well off world might be able to field a company of those types, but there's a lot better things you could do with the money and resources going into that.

>Imperium
>Ever spending its money sensibly