Yeah I just haven't been critiquing customs, but I have been futzing with some simple parts I've slapped together here and there at my house, I just haven't had energy to catch up on commenting around any boards... Life keeps me from customs more than I'd like it to, but that's just the way it goes.
Anyway I'm trying to comment now on the previous update, and get the other one next...
Commander Seph... A nice use of "parts you have lying around", I must say. I don't have much laying about clone-wise but some Bacara bits here and there. I even had to use the one right arm to replace on a Bly that came as a factory defect, so Clone parts just aren't something I have many of.
The paint's cool, and I can definitely see the sniper look... The cammo pattern, but not too cammo (IE: Not all over or with a guillie suit or whatnot) makes sense. He could teach snipers, sharpshooters, etc... I wish I had that kind of random junk laying around though. AT-TE Pauldrons aren't too common in my fodder bin unfortunately. I like him and he's a good use of stuff you had extra to make yet another Clone Trooper style.
Ubiquitous Service Droid... A fantastic use of, again, random parts... But again I must say that I wish I had the WEG-1618 droid around for customizing, haha. I was really wanting to build a small army of him, as he's one of my favorite droid figures in the modern line actually. Hasbro went all out for detail on that one though. The work you did on yours is equally impressive too.
The rust, grease, and general grime all over him are really nice touches to make him look like he's seen a long hard life. The treadwell head fits it perfectly too and adds a look of classic SW simplicity. Like the droids look in the classic films. The EV-9D9 legs are equally simplistic forms of mobility for the droid. I like that you took the time to paint the wiring... If you'd wanted to, you could have added some bulk wirring from old electronic devices to the figure to change up his overall shape and add dimension to him. I do this with some droid figures and parts as well just to have "ground fodder" for any set-up from Jawas to Tuskens to Imperial trash compactors. Good stuff to think of.
I'm amazed how many different droids make up that droid... Not a single piece is from the same figure save for the legs and arms matching as pairs. That's great man.
Assassin Droid... Again another nice use of parts though easier to recognize. The way the Sith probe seems to match the body is really neat though, and really that could make an equally good simple protocol droid. The grime and grit paintjob is cool... I could have seen you going for something less base metal in color though and maybe a flat grey, or some other base military color, if he's a war droid... If an assassin droid I could see a shiney black or gunmetal color, dark, with some nicks down to a bare silver base... I dont' know why, that just comes to mind.
The red eyes on the head really stand out and look sinister. Very much like the same items on Separatist battledroids, sot hat's cool, and the angled antenna is great. Maybe a backpack would be in order for him too? Perhaps even a jetpack? Make him that slightly bit more deadly.
My only other thought is his gun seems off unless you're wanting him to be a Sep droid... I could see a smaller gun, perhaps with something that braces it to his firing forearm so it aims easier... Of course, IG-88 doesn't have that so I'm simply talking out my ass really.