Over the weekend, I tried my own test with 1v1 Illuminator vs Assailant (along with a few other matchups I was curious about). Unfortunately, I don't have any replays (never tried to make one). The map was Quickstrike and the fights were done in the sun's gravity well (neither ship uses AM anyway). I turned off auto-attack until both ships entered the grav well and were out of range of the other ship. I then turned on auto-attack on both ships at the same time.
Illuminator vs Assailant (no upgrades): Both kill eachother. I was surprised that the assailant was able to get that last volley off before it died and it was just enough to kill off the Illuminator.
Illuminator vs Assailant (Full upgrades...shield, hull, armor, weapons, and special abilities): Assailant wins with 90HPs left. Had the Assailant gone for the Illuminator's copy, it certaintly would have lost, but since it didn,t switch targets, that eliminated the Illuminator's abilities' usefulness. Believe me, I was surprised that the Assailant won this round especially since it is a teir 1 ship.
Illuminator vs Skirmisher (Full Upgrades as well): I did this just for fun and to guage how effective Reintegration was during battle. Skirmisher wins with 300HPs left and immediately Reintegrates to get back full health. This fight took more than 5 minutes to conclude. The Illuminator could not gain any ground once the Skirmisher would cast Reintegration. The Skirmisher would get down to about 300HPs and then Reintegrate, restoring 12HP/s while under fire. It would get to around 550HPs at the time it stopped reintegrating. The Illuminator would just be able to wear it down to 300HPs again before the Skirmisher could again cast Reintegration. Although the Illuminator's shields and health would regenerate naturally during the time the Skirmisher was Reintegrating, the damage done by the Skirmisher between Reintegrations was greater and it eventually wore down the Illuminator.