(I have most of your stats on my computer, but please everyone update in the RG)
You arrive flying and invisible (thanks to Aleena). After the fog rolls in, Maggie enlarges Timrin and reviews the known strengths and weaknesses of the metal men (+3d6dmg all), Fin lifts the soldiers into the air with his gravity spell, and the rest of the group moves in.
Murdoch blasts the soldier patrolling the walkway, just as Shando puts his hand over the soldier's mouth from behind. Shando pulls the soldier back while jamming his elbow into the back of his neck. The soldier falls without a sound.
Meanwhile Alethia shoots the metal man at the end of the walkway with an arrow (27dmg). He looks around and electrical energy craxkes through his body. He transmutes his hands into a sword and a trident, then air around him crackles as well. The fog around him turns to icicles and clatters to the ground, clearing the visibility around him, but not enough for him to spot you guys, especially since you are all invisible and not all that close.
Materializing next to the metal man by the controls, Timrin drives his blade into the middle of the metal man (65dmg). The two soldiers see the hole open up in the metal man and start yellowing in their native tounge. One of them is cut short as Dyria's whip-dagger strikes him in the back, badly wounding him. Each of the soldiers and metal men momentarily burst into flames, and five of the soldiers by pillars fall dead.
The soldiers recover very fast, likely aided by Cronos' time magic. Dyria is faster. She steps towards the one surviving soldier by the pillars and stabs him in the chest with her whip dagger, then rips it out, whips it over to stab one of the soldiers by Timrin, then yanks it out, spins it around, wraps it around th eneck of the other soldier by Timrin, then pulls, beheading him.
The metal man by Timrin does the same as the other one did, but instead of clearing the air, he makes it conndense on Timrin (who he can apparently see) making him visible to all. He then stabs Timrin back in the stomach with his trident hand (x3 crit 55dmg). With the trident still in Timrin, the metal man keeps on going. Timrin manages to dodge a blow from the sword hand, but the metal man slashes him on the way back (23 dmg). The metal man turns his trident hand and pulls it out (18dmg). Timrin sees the metal man jerk around a bit, as he is hit three times with Maggie's scorching ray. The creature melts and the metal begins to evaporate.
The other metal man turns and charges down the path, turning his trident hadn to a lance. He does the same ice-condensing trick on Shando, but Shando manages to dodge it. Murdoch blasts it (54dmg), but it is stil alive. Alethia fires arrow, but only one hits (crit 34dmg). Shando, riht next to him, has nothing left to do but strike at him. Each blow of his Cronos-bane fists blasts pieces from the creature, and it dies like the other one.