I feel like literally everybody is using sun in AAA besides me.
I mean, it's a great sun core and all, but it's so generic and overprepared-for that honestly, I can't see it being as effective as it would be if sun weren't so good in the meta.
I've been trying my hand at a stall team, and so far it's definitely one of the better stall teams I have built. Landorus-T and Heatran synergize so well together defensively as long as one of them has a water immunity ability, whereas skarmory is a reliable defogger/sweeper/hazard setter...I just feel like people should take a look outside of the generic sun team.
Another interesting thing worth trying out is sand (and I think that's what the core was made for); all three mons are immune to sand, synergize well, can beat other weathers together, blah, blah, blah