5 paladins

[Apatheist]

With 5 hammer of justice available I'm not sure what you mean/pretty sure you can kill groups 1 by 1?

HoJ has a 10 yard range and 45 second cooldown talented. You catch some people but the whole time you're chasing you're doing no damage and being nuked from multiple directions. You can see it in the video. At Gurubashi Arena when the horde group gets smart and starts kiting the only targets he can kill are the dummies that run to him. Granted, he starts to get outnumbered a fair bit as more horde arrive towards the end but you can see what I mean.

All boxed melee teams will face this issue to some extent but at least warriors can cycle intercept. Intercept (talented) has a 20s cooldown and you can follow up with hamstring/MS. With 3 warriors I have an intercept available every 7 seconds or so.

If I just wanted a fun team to mess around with I think I'd prefer 5 druids to 5 paladins.