I have noticed many similarities between the Outsider-verse and the Master of Orion 2 verse, I hope no one will find it presumptuous of me to guess at a few things using MoO2 rules.
The Umiak have tier 1:
Titanium Armor The most basic grade of ship-building metal, known in many forums as "cardboard" or "tissue" because such ships are ridiculously fragile.
The Loroi possess tier 2 armor (and only by the grace of their Historian allies research treaties):
Tritanium Armor
Twice as tough as Titanium Armor; gives ground combat units a +10% bonus; makes missiles and fighters tougher. The first armor that's fit for combat.
With the Historians it is harder to gauge, we've seen too little of them for me to make an assessment of their armor values. I would guess at their possession of either
Neutronium Armor The 2nd best armor you can research, 50% tougher than Zortrium; also gives ground combat units a bonus of +20%; makes missiles and fighters tougher.
or perhaps the more advanced
Adamantium Armor The best armor you can research, twice as tough as Zortrium; also gives ground combat units a bonus of +25%; makes missiles and fighters tougher.
The Umiak are using heavy armor on all of their ships which triples their armor values, if we divide their armor by 3 we can see their armor is quite comparable to the Terran vessels. I believe the Terrans possess Titanium armor.
All information is from
http://strategywiki.org/wiki/Master_of_ ... /Chemistry at times it is inaccurate, but is reliable overall, I think. Great game by the way. I purchased it for the first time after following Outsider for a while and reading through the inspirations section.