1: Take any warrior.
2: cover them in Melira's oil antidote.
3: Give them the following things (all available to the Mirrans):
a: Darksteel Plate
b: Lightning Greaves
c: Whispersilk Cloak
d: Worldslayer
4: Send them into any Phyrexian stronghold (I'd target Elesh first, but that's just me.
5: Replace b. and c.
6: Repeat 4 and 5 as many times as necessary.

I wish they had won. It would have given us so many good edh cards. I CAN FEEL IT

Darksteel is rather rare and very hard to manipulate, making it not a very reliable resource to use. Likewise, invisibility doesn't work on the Progress Engine, as a Neurok ministory from the flash thing showed horribly.

I'm surprised that the mirrans put up a fight at all, considering the tactics the phyrexians supposedly used in the Planeswalker's Guide (early discreet missions that pratically won them the Tangle overnight, converting the sea into a deadly corrosive liquid, attacking everything that showed hints of individuality, et cetera).

The Phyrexians established themselves far too well. By the time the Mirrans knew about them they were everywhere, with spys and to some degree political influence throughout the world. Whereas at the start of the war the Mirrans were still fighting each other.
I don't think the Phyrexians were guaranteed a win simply by being Phyrexian, but the way they played their opening hand sinched it. The Mirrans would have had to get their act together very quickly if they wanted to stand a chance.

Not sure on the lore, but if everyone was smashin' up the Plane with Worldslayers, wouldn't that destroy a lot of stuff? I mean, obviously not the things coated in Darksteel, but maybe every single other thing?

At least a battlefield's worth of stuff. Just make sure to make it the enemy's battlefield.

Pretty much confirmed, what with mirran infighting being lamented in several things of the flavour from the flash site.

Also, if you're going games-mechanic verse the Phyrexians could just drop the Voltron Into the Core: Whispersilk doesn't give itself or the other equipment shroud.

A ) That is not the way Melira works.
B ) She couldn't even use her ability until after Tezzeret freed her from the Phyrexians and handed her to Elspeth, and by that time, Phyrexia had completely converted the entirety of the inside of Mirrodin.

Should have use ascetism.

Should not have boring design. Seriously, is anyone actually sorry the Mirrans died and where replaced by something more interesting? (Unless, of course, you believe that the models of Mirrans in your head have sentience and were thus more or less alive in which case, yeah, kinda sad.)

Yes. You're honestly not concerned at at all thousands of sapient beings were horrifically mutilated and brainwashed, only to end up as very low ranking members of Phyrexia?

If it were real, I would have supported the Mirrans to no end. But it's not, so they're just boring foils for a more interesting antagonist.

A single death is a tragedy, a thousand a statistic.
Plus, as a planeswalker, I've got my own problems and there are over a trillion trillion worlds, most with their own problems.
The only reason one would care about the Mirrans amidst the cold callous breadth of the multiverse is if they were somehow important to someone we knew.

The very first time the Mirrans interested me was in New Phyrexia. I disliked them in Mirrodin and kind of hated them for being so darn flat in scars, but those last rebel holdouts... the few of them there are living under Urabrask's shadow are worth more to me than the sum of all the mirrans that came before.

Of course, the New Phyrexians were more interesting still, but that's because the PWGs were really well written.

You can feel it huh?

Mirrans are so shiny and smooth and clean, phyrexians are spikey and dirty and full of biological junk. I find Mirrans more interesting.

I'm quite sure most Mirrans are also full of biological junk. More so than Phyrexians, actually.

The human ones yeah, but at least they have style.