Iruka is a pretty versatile ninja. Although.. You could always keep saving for a big Damage dealing ninja, like Sage Naruto. :p

Honestly, I think Iruka will always be useful.

I don't have him, since I'm f2p, but the buff he gives is super useful, as is the shield. The fact that his mystery does considerable damage and also interrupts is also something that's always attractive.

If you have the resources to spare, get him; he won't be on your main team, by any means, but he'll always have a presence in Survival Trials and Ranked Battle. Of course, if you're looking for someone that you could use on your main team, you can keep saving, in case they come out with a cheaper way to get Konan or PB Sasuke or something.

Iruka isnt so powerful without a power team that can take the best form iruka's passive. He's really good in ranked with konan too so u can do all shield team :)

Well i am f2p and i only bought frags for 2* and i am using it in nine tails event mostly, however i have seen p2w using Iruka 3* in main team with all konoha ninjas doing pretty good damage with his buff.

^This /10chars

Even at two stars he is worth it. Seriously grab him - the buff/shield are great on their own. Tack on his interrupt prompt, solid damage and evasion and you will have no troubles finding a team for him.

Anyway depends... How is your team now? And your main? Example my team is:

Gnw kankuro,main,main copy
Kabuto,hinata,kabuto copy
---- puppet,kabuto copy. I prefer this team,so if u want iruka u must have a good team to use very well his. But u c*e it in kurama and ranked Battle too. But i dont like iruka in a main team.

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Do you know any good lineup for lightning main with iruka?

Sorry i don't, i have never used midnight blade.

I found this on forum:

http://forum.naruto.oasgames.com/en/forum.php?mod=redirect&goto=findpost&ptid=6537&pid=38049&fromuid=104183