SkarmBliss isn't even that good? It's a pretty shitty combo in that you're getting practically zero offensive production from either slot
Honestly the team you posted is fairly poor, with numerous gaping flaws. Firstly it's literally 6-0'd by FBLax. Second it has literally no offensive avenues besides Lax and hoping for a freeze. Third is Lax itself- that's a really support dependent set due to its mono-normal coverage and you've given it absolutely no support. Overall it lacks a core strategy beyond hoping for a freeze and trying to last long enough for the opponent to get bored and quit
"Lax itself isn't very versatile" this is blatantly untrue js
In all honesty I find it easier framing the problem as a question of building around Blissey than around SkarmBliss- Skarm's a staple that's easy to fit on a number of teams, Blissey's far more awkward due to being redundant (Kou and Lax are already pretty good special walls) and a deadweight offensively. As HereToHelpRBY said, if you're intent on running SkarmBliss, your next step is to add a Lax to the team. Because of Blissey's sponging capabilities vs most special attackers, I need to lean a lot less on Lax to sponge those hits, while you also need to add some offensive firepower to your team. To me, this means DrumLax is a natural fit and I'm running either EQ or LK in its 4th slot.
If I run LK, then TTar is a natural choice for the 4th slot on the team, due to checking FBLax and providing invaluable Pursuit support for Lax (Umbreon is also an option, but it's sooooo passive). I'm then looking at adding Spikes to the team since it could really use some passive damage. Cloy seems nice, as it's generally more useful than Forry and the team would probably appreciate a bit of extra Wak insurance. That leaves patching up a gaping Champ weakness as well as ideally finding some Vap insurance and a little more offensive firepower. Also consider wallbreakers such as NKing and DNite, as well as making sure that Zard doesn't 6-0 you (I mean Zard's not very common or good, but shitting on SkarmBliss is exactly what it does, so you need a plan for it).
If I run EQ, then there's not really any need for Pursuit support, so there's a bit more freedom in terms of teambuilding. Some things to look out for are a secondary Lax check, Spikes plan, insurance for Wak and Champ since they can easily wear down Skarm, as well as plans for random other threats such as mixed wallbreakers, Zard, maybe Vap? Idk how reliable Blissey+Lax is in dealing with Vap since iirc Blissey doesn't actually win 1v1