I just finished a Kill Team tourny and I found that my biggest enemy was time. Silly me for showing up with 23 models of kroot, hounds, krootox, fire warriors, and a crisis suit.
Having 3 paladins might actually be really good to have. But I would take all defencive abilities if you're taking that few models. Like Eternal Warrior, Shourded, It Will Not Die, and Feel No Pain.
And I would take a psycannon. You might really need something to die like that guy who brought a lascannon/meltagun/plasmagun that got +1str or 5 minutes left and there's an enemy holding the centre objective. And give it to your leader, that chart afterwards is useless unless you get some kills in the game.
Cheers!