So I made a mission called "Terran Endeavours". This is a mission that sorta started as a quick 'kill 20 terran ships' filler for when that particular endeavor cycles through. It evolved a bit and is tied to the roleplay of the Imperial Union of Planets fleet, and has a small plot that advances the meta-plot for the IUoP universe slightly. Thanks to Aisha Cthylla Sato(fleet leader and creator of the variant of the MU her fleet is set in) for her input and support! Due to how terran science and escorts work this mission can be very difficult at times.
Any can enjoy this mission, especially if you want to kill 20 or so Terran ships, but obviously, the mission text is aimed at the RP of this specific fleet. This is quite a bit more advanced, from a technical standpoint, than my previous entries. Still, its probably quite simple compared to what some authors here do. As of the time of this posting, neither the fed nor kdf versions have the required 5 reviews to get out of initial limbo so you'll need to find them on the 'review' and 'new' sections of the foundry tab by searching for them by name.
Start at the Honod System in the Beta Quadrant, Xarantine Sector
A KDF themed version is up, named Terran Endeavours [KDF].
If you enjoyed this, please give my other mission a try 'Tal Shiar Turkey Shoot' and 'Tal Shiar Turkey Shoot [KDF]' The fed version has gotten a lot of compliments and is used a lot. One can access it at new romulus in sector space via the system popup. The KDF version, sadly, is in need of reviews before it sees that perk.
edit:
oh and if anyone is curious about the difficulty. I have successfully done it using a t5u excelsior with green/blue mkXII gear and not died, but at the same time Ive seen a fleet mate with all gold XV gear get slaughtered by ending up with a terran science vessel and escort combo.