I have the doubt if using a sub-faction "fair" (eg "tec fair" that are strategically style "turtle) would be good to be in the configuration Choose" aggressive. "what do you think? from already thank you very much
I don't really think so, though they (Loyalists) do have some nice defensive abilities and upgrades, in this game active defense is better than static ones, so better to invest in ships and some starbases on your border worlds. Fleet+Starbase+some repair, if you compare TEC Loyalist and TEC Rebel, they are almost the same, Rebel is better because he can actually fight back (Loyalist ships lose their boosts when going out of their gravity wells) and their titan is better for offensive tasks (Ragnarov is better against AI than the Ankylon, and it is good for defensive tasks also due to its huge firepower).
But if your playing style is turtling in hard, then yes, Loyalist is a better choice, though I recommend trying the active defense (having a big fleet with light defenses on your planets), it is much better. 1 starbase upgraded somewhat, 2 repair stations, 1-2 hangars with turrets on them (level2 defense research) and ships, lots of ships, this is the best defense in Sins, and it is able to kill vast number of AI ships invading your planet.