This is a really great team! It helped me get started with sun so I want to be able to thank you. I'm doing my best laddering with it right now to help get it archived. In the meantime, how about some suggestions:
I think you should replace Durant with Scizor. Scizor checks Terrakion whilst acting as a fail-safe against Latios. It also provides some much needed priority for the team. Unlike Durant, Scizor doesn’t just roll over and die to any special attacks and can muscle its way past Gliscor after a couple of boosts. The set I recommend is:
Scizor (M) @ Life Orb
EVs: 232 HP / 252 Atk / 24 Spd
Adamant Nature (+Atk, -SAtk)
- Swords Dance
- Bullet Punch
- Bug Bite
Scizor fits in well with the strategy of the team. It can take advantage of the sun to get past bulky waters and checks many more threats with powerful priority. Scizor also has more targets to set-up on and increases your overall consistency by utilising moves that are perfectly accurate.
The next change I would consider is with Snorlax: I think Fire Punch should replace Crunch. Pursuit already does a decent job handling Ghosts but Fire Punch can be used to take out Ferrothorn and Scizor since most of them don’t carry Superpower any more. Also, since we’re not using Durant, Body Slam should replace Return. The extra chance of paralysis helps against many things hoping to switch in on a weak dark-type move.
That’s all I can think of at the moment, I hope it helps. :)
As long as I have this eye... I can repaint myself.