I don't think Suicide Masteries are the first thing a new player should invest into, but it's definitely a nice thing to have.If you're willing to invest the time to get the units for it, then it's very worthwhile. But imo, it's one of the last 'premium' masteries you should invest in.
You need to manage how you use special attacks if you get suicides as you will need to unlock recoil.
Suicides are great depending on your top champs. I have Ghost, Corvus, Namor, OR, Sentinel, Hype, Medusa who are all good for it. But also have Blade, Sparky, CapIW and Cull who it makes much worse. If you see yourself having to switch them on and off a lot then don’t do it. I keep them on because I can easily do all content with them (AQ, AW, Questing, etc).You get used to only using SP3s or just trying to end fights with SP1 or 2s.
If you're at the point of the game where you have a sig 200 Ghost, you really shouldn't be asking this question...
Suicides are great depending on your top champs. I have Ghost, Corvus, Namor, OR, Sentinel, Hype, Medusa who are all good for it. But also have Blade, Sparky, CapIW and Cull who it makes much worse. If you see yourself having to switch them on and off a lot then don’t do it. I keep them on because I can easily do all content with them (AQ, AW, Questing, etc).You get used to only using SP3s or just trying to end fights with SP1 or 2s. These are some of my top which is why I'm on edge I know Ghost would benefit along with Emma hyp rogue (to a degree) but I use wasp and ant (for quantum trinity) ld