In 5e there are now group checks.
I've been running skill challenges like 4e however now that attributes are skills too I'm finding the skill challenges are really boring and even disallowing back to back skill uses are not helping I'm. Not sure what to do
Skill challenges were always boring and awful because the whole process usually degenerated to its bare mechanical bones of repetitively rolling dice and tabulating the results.
Which was never their intent or their rules explanation. When play devolves to that, when the guidelines clearly stipulate that it should be done differently, then the DM and players need to look at what they are doing and modify it to taste.
What you described as "interesting skill use" is exactly what the guidelines were asking the DM to do.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.