I run Fire Storm Citadel every day with Demonicsothe when he is online because we are both used to doing it. Occasionally in D25, there are a few rooms that I do wrong, and I know it but I have never figured out how to, so I figured I should ask the community.
Rocket-Puppy room- Every time I do this, I use an alchemer and spawn the lower zombies and then go the opposite way so I don't awaken the rocket puppy. I'm aware I should be doing this with a Pulsar, but I only have the 2* version =/ I'm wondering what the best way to do the rocket puppy room without dying is.
Trojan Room(top right)- Demonic says you can hit the ghost block without spawning the trojan. I assume with vials, but I never got the chance because the one time I did it, I tried shooting the block with a Silversix. The trojan spawned, so I'm wondering if I did it wrong or what the best way to do it is.
As soon as you enter the room, start shooting with that Silversix and don't stop - I always use my Argent Peacemaker to hit the ghost block without spawning the Trojan. I think your issue is that you're already too close to it before you start shooting.
And if it does go wrong, run out. Antiguas can shoot through forcefields.