Your "deathstar" command squad would benefit more from bolt pistol and power axe rather than fist for the extra attacks,
IMO... Having that many bleed into the enemy hero you're tanking against with your
CM could really hurt. Power mauls are also good if going against hordes. However, you then have to lose the storm shields.. I guess
YMMV. If you are planning on buffing them to get the re-roll failed saves, I'd think that you would be just going flat out and jinking everywhere to get into
cc, so the 4+ rerolled on them seems fine to me... the stormshields are expensive anyway. But, again,
YMMV.
Along the same lines of building up this deathstar, don't you mean to have all 3 libbys on bikes to ride with the command squad? If not, I'm not sure what the point of taking the conclave is (you want them on bikes to make a deathstar).
Ok, so for the rest of the list... I'd go with all drop pods if you're gonna land multiple iron clads in the enemy's face... but rhinos are fine too and can help block the field to/from your deathstar.
I don't think the solo ironclad will do much for you on the drop, alone (although he can fire both missiles so that's nice), and the other dreadnought will have a hard time making an impact, as he's mixed between
cc and ranged. I'd try to upgrade him to another ironclad, or maybe balance out the list with something else?
For the
devs, I'd try to get them all to lascannons... you'll need the range if you're sitting back. In this list, people will most likely NOT shoot at your deathstar, so these guys are probably gonna die... they may be a liability in this list for you... maybe bare-bones in a rhino to take an objective would be better, if they are a tax of your detachment (not sure what you need to fulfill this formation).
The assault squad may be nice to deepstrike, if you give someone or something a beacon... on foot they always have a hard time surviving.. but I'd be interested to hear any success stories. Perhaps you could replace them with an attack bike (or unit of?) if they are a tax unit as well?
Overall, I could see a list like this working if you spammed
MSU and Ironclads on the drop... but perhaps there's more to this i'm not seeing.
Finally, Deathstars are cheesy so have fun being "that guy" haha -- the fluff-loving side of me had to say it
lol j/k
Hope that helps.