Iruka is basically the default support for any Konoha team you can think of. He's a must have for PvE content and he's still decent in late game PvP, not always first choice support, but dmg buff and a shield for all Konoha ninjas goes a long way. And you can upgrade his stars slowly through recycling other 5* ninjas extra fragments. Plus, he's one of those "Home" ninjas that boost your stats when you level his "bond" up at Home interface, so there's that, too.

The classic LM blitz team that USED TO terrorize this game was LM, AsumaWB, Iruka, Danzo. Some people still even run that in swb just a few weeks ago, and it still do great with enough BP difference.

A typical 9tail team is Yamato bt, Iruka, Asuma WB, any main.

I've even seen some people on my server runs him in the typical Edo Minato or 6PN lineups. Basically, you can't go wrong with Iruka in a Konoha blitz lineup.