[Alneyan]

Shield Disrupters come with Shield Damaging Weapons (as Shield Depleters) after some research in this area. They shut down shield generators, but have a short range and are very costly. They can be useful if you are overwhelmed by shielded vessels, but Shield Depleters are better otherwise, especially if you want to fight at long range.

Combat Sensors give you a huge bonus to accuracy, and ECM gives a similar bonus to defence. These two cancel each other, so they will not do anything in particular if the target has these two components too. However, if they have ECM and Combat Sensors and you do not, all your weapons will miss and all of theirs will hit, so Combat Sensors and ECM are needed.

Your research list seems fine: there may be a few other things interesting for you, but you will find them as you play the game. You have the essentials covered here, and your vessels should perform much better in battles with these upgrades.