I love the idea of this card. I play Screed on a VSD and 2 GSDs. Demolisher is a no-brainer and I've used it on every game I've ran. However, I've probably had 9 games with Insidious and I've only been able to use it on one game. To be fair, it was awesome once it kicked in, but 1 out of 9 is just not often enough.
It's a great pity though --- the idea is cool --- being able to use black dice out to medium range, plus Screed... ooooh! The hurt! It's actually getting the GSD in that position though. I've found that it is hard enough to do a flanking attack without being subject to so much attacks. If all my ships were jousting against him, sometimes his ships can only do one attack. Having a ship that is trying to flank means there is now a secondary target they can shoot at. I can mitigate this by making my Insidious GSD go around a bigger circle and thus only risk red-dice attacks but then the next problem is closing the gap once I'm behind the enemy. There is also the issue about the GSD not being much of a threat while it tries to flank....
On the few instances that I have managed to set it up that I am at a ship's 6 o'clock, it's usually at medium range.... and he is the first player and simply activates his ship, fires at all valid targets, then runs away. If only there was a way to combine Insidious with Demolisher.... a GSD that is chasing another ship is useless without Demolisher, but a GSD with Demolisher usually doesn't end up in a "chase" role anyway.
I wonder if it's just me and the way I fly? Has anyone else had much luck in getting Insidious to work? Or should I just shelf this for now and find another use for my GSD? I usually bid low, decide to get the other guy to be first player, and my Objective cards are Advanced Gunnery, Contested Outpost, and Intel Sweep. The only time my Insidious kicked in was against an almost mirror build (Screed, VSD, 2x GSDs) and playing Contested Outpost.