Ok. So went out with FGS build (see previous posts) and did some test runs solo against Thargoid Cyclops. Never died, so far so good, but my best run ended with only his second heart down to c. 30%. Main challenge is really hitting with AX MC. I think I have a good grip on managing the swarm, taking shields down and avoiding the worst of the lighting / disable field, but I struggle to efficiently hit the hearts. Is it the hardpoint placements? I have both MC in the front class 2 points of the FGS? What is the best distance? Somehow I think getting close doesn't help much as then only one MC hits. Micro-locking of fixed weapons really works only if the thargoid doesn't move, with every evasive action, even If I lead and shoot as per indicator, the % of hits seems to be low. Does it make sense to swap for turreted MCs? How can these be managed to only shoot at hearts and not at the hull? I know that probably my aim is not the best so grateful for any pointers on how to get better specifically with thargoids...
Put the MC on your tightest two hardpoints. Do not attempt to use turrets, they are terrible.
The optimal range to take down the hearts is 1 km to face blank. When you module target, your fixed weapon will have a very minor gimbal effect if you aim accurately and have good convergence on the hardpoints.
Also, learning the Cyclops' maneuvering pattern and reading them accurately is essential. Such as shooting the hearts from behind is much more difficult, and that they occasionally retreat. Also watch for the direction they drift in, you'll be able to predict where the predictive HUD is going.