Dealing with Vasari Kortul first
I'm playing Sins of a Solar Empire vanilla (i.e. no Diplomacy, no Entrenchment, but with the latest patches). The games I play are generally 1v1 on small or at most medium maps; I have however played one 2v2 game and ran into the same problem. These games are against another human player. I tend to play Advent, although I can play other races as well. I'm quite new to Sins of a Solar Empire multiplayer; I've played less than 10 games.
So the problem is my opponent picks a Kortul first - and the stupid Kortul won't die. I could have quite a large fleet (like 10+ Illuminators and my own capital ship) focusing on the Kortul, yet Power Surge ensures that it 1) won't die 2) if it does take a lot of damage it can get out and 3) it's still shooting, so my own ships take mega damage in the meantime. Here're two of the games I've played against this strategy so far.
1. Medium map, 2v2. We spawned next to each other so we fought each other, with our allies generally staying out of our business. I go Progenitor first and fast-tech to Illuminators. He goes Kortul first and fast-techs to Enforcers. I colonize faster than him before we run into each other. It was still early-game at that point, but I had more Disciples. He fled, leaving the Kortul behind. All my Disciples + my Progenitor kept shooting at him but he didn't die. He didn't even take damage. Eventually my Progenitor takes enough damage for me to break off. He breaks off too. Some time later he comes back as a solo Kortul this time, harassing my planets. I leave some units to fend him off, except THEY get fended off instead. The unkillable Kortul won this game for my opponent.
2. Small map, 1v1. I get a Halcyon and rush a second capital ship, another Halycyon, massing Bombers and Aeria Drone Hosts. Again when we first meet he flees. This time the fleet had enough damage to hurt the Kortul, albeit not enough, and the stupid Kortul makes off with another rearguard action. I decide to push my advantage and attacked one of his planets. I don't know what went wrong from here. I couldn't take out his defense. He gets a heap of Flak frigates and wins. I think I made some mistakes with micro here, letting my fighters and bombers attack his Kortul instead of his buildings, but I'd anticipated the badly-hurt Kortul would have to flee. It didn't; the Kortul still refused to die (he parked it at the edge of the gravity well and I didn't pursue him through the entire well). With my strike craft occupied his ships took out mine.
How do you beat Vasari Kortul first? What do you tech to? All I can think of right now is rushing a second capital ship once I see the Kortul, making it a Radiance to detonate his antimatter - but then with Disruptive Strikes he can disable the Radiance as well. Meanwhile Disruptive Strikes also shuts down the Progenitor. The Halcyon is unaffected, but when I used the Halcyon the Kortul would push up, tank all the Bombers and hit the Halcyon. I can't see any other options, and even this one looks at risk to him rushing another Kortul. I can't see what else to tech to as well. Illuminators are ineffective, but aside from Destras I can't think of anything that would hurt the Kortul enough - and Destras take a long time to tech to.
Strangely enough nobody seems to have mentioned this tactic anywhere, so I don't seem able to just read other topics >_<
Any tips?