Editing Warhammer 40,000/Tactics/Mechanicum (30k) (section)

===Heavy Support===
*'''Myrmidon Destructors''': Similar to Myrmidon Secutors, but have Preferred Enemy (Everything!), which is pretty great at BS5, though they can only  pick 1 weapon.  Also their models are freaking awesome.  Their options are all more specialized to targeting a specific type of enemy and as such it's best to give them all one type of weapon rather than picking and choosing between several (with the exception of Irradiation Engines), give them all Volkite Culverins to watch Orks and Guard (or any 5+ save unit) cry all day long, on average without cover saves you'll actually kill more models than you shoot.  Photon Thruster Cannons are good at forcing Primarchs to take a lot of saves and chip away at Terminator squads thanks to their AP2 and incredible range.  Irradiation Engines are your Marine removers, giving the whole squad these is overkill (remember that Torrent weapons can be placed differently to a standard Flamer), and considering how much 2+ armour there is in 30K it's better used alongside the Photon Thruster, either to remove the 2+ Sergeant before nuking the squad, or using it to wipe the squad and exposing the Sergeant before shooting him.  Lastly Conversion Beamers are only really the optimal choice if you're up against other Mechanicum where you'll likely be facing a lot of high Toughness monsters and the S6 from the Photon Thrusters doesn't quite cut it, but at that point you're better off with a Thanatar.
**Something to keep in mind is that despite the Powerfist the Destructors don't do all that great in assault, this is because they're locked at 2 attacks base and not in a way that they can be boosted to 5 like the Castellax, they're not bad, as in they'll hold their own against tactical squads and the like, but dedicated assault units will mulch right through them.

*'''Thanatar Class Siege-automata Maniple''': 240 a pop, but they're t8,s8 2+.  Go look up a picture and see how sexy they are.  They get Hellex Plasma Mortars for Instant Death on marines and wiping out Terminator Squads.  They're also the only other model in your army that ca get the Paragon of Metal upgrade, because you've put so many points into this guy that you might as well make him even more durable.  Searchlights are so cheap they might as well be a free upgrade, keep in mind that at T8 they should be able to deal with anything that shoots at them, and the Enhanced Targeting array helps a lot, both with its Mortar and the Twin-Linked Mauler Bolt Cannon (use the cannon second to finish off whatever the Mortar does not).
**Something to keep in mind is that despite being S8, T8 they actually don't do assault very well, like the Destructors they have 2 attacks base and this cannot be increased like a Castellax, and at WS3 they'll be lucky to kill one model per turn, so if the enemy gets into combat with them that's 240 pts (if it's only one) that'll be sitting the entire game out.
**Watch the fuck out for Instant Death weaponry, even more so than the rest of your high-point army.  While it's rare you do not want any 240 point model (base) to suddenly die because Mortarion tele-ported right next to him then kicked his ass in assault, or if they suddenly die to that Praetor with a Combat Augment Array who made their Paragon Blade roll a six and beheaded(more like impaled its cortex) your Thanatar.