Must be a regional thing, because stores around me couldnt give away Blackarachnia. I also dont see Oil-Slick hardly anywhere. IMO Ratchet is a poorly designed TF. The leg joints are terrible. I like his accys and alt mode, but thats about it. Lugnut was the first TFA voyager I got and I think both versions are fantastic. I like the colors on the Atomic version a little better, but both are still awesome. IMO get the deluxes first, as there is no urgency anywhere (apparently) for anyone to run out and get either Lugnut.

 

i do not yet have any of these figs so this is useful knowledge to me as well  

 

Got all of the mentioned figures. Really, I'd ask what your gut preference is and go with that.

Lugnut is neat little guy, but the scale can be quite bothersome for some people.

Blackarachnia has some neat features, but she's a bit weak in both modes.

Oil Slick is quite slick, but his hands can occasionally be annoying.

Ratchet looks spot on, but the tools, the 'magnets' and his legs can be trying.

Overall, I like them all, for different reasons.