I’ve got a difficult choice

SPOILERS

So after helping Strider in the early game and going to Icarus I fully help the ward and complete all the missions at Icarus. I don’t like the Ward but I felt it would lead to maybe some good things, and also screw SIRCAA. Luckily it led to the Psi-Suit for the swamp. I want to side with Spark so when I meet up with Scar and Strider at the Ranger station I have a choice but I don’t know the outcome. Should I kill the ward or leave both parties alone in the firefight. I’m thinking since I did a lot for the ward then if I kill them then all I did at Icarus… totally didn’t happen at all. Would this affect anything or any unknown things? Would my plan work? I just want to side with Spark/Noon.

Also, is there an option to side with both Ward and Spark/Noon to make them work together. They share similar motives as Ward hates SIRCAA and Spark/Noon don’t want to see the resurgence of Monolith which Faust wants at SIRCAA.

Sorry I know everyone hates questions on gaming subs, especially the specific ones.