Hello sir azelf,
This looks like a pretty solid example of old standard voltturn so congratz on that. Since you include exca I assume this team is more for show because it would be impossible to reciprocate the offensive and support presence he brought to your team.
The only flaw I see is the scarf lando, whose choice item will effectively neuter him against common defensive cores with protect rachi and gliscor making them very hard to break through for this team. If you want to keep the voltturn theme I suggest changing him to an ebelt set to be able to change attacks and lure key defensive threats by bluffing a choice item. Also I think you could test the sub smack down set to help you put pressure on team with skarmory, but you would have to sacrifice uturn. You're team won't miss scarf too much because excadrill will still get a lot of his revenge kills.
Next your team is a bit weak to cm Virizion who can 2hko scizor on the switch with focus and get free set up on ttar and rotomw. Also you have no way to ko cm reuniclus because he can just recover off scizor uturn. OTR too can probably pick off a weakened scizor lategame. A simple change to sd roost scizor with uturn would be a quick fix with a spread of 252 HP / 40 Atk / 216 SDef adamant nature, but if you don't like him and wanna keep cb you could give Ttar crunch over stone edge and invest enough attack to 2hko cm reun (88 +nature iirc) that way you can put reun in range of cbzor uturn and you trap with pursuit. Right now reun just set up on ttar... Trick on Celebi is another option to cripple cm reun and help against stall but I think giving Ttar crunch would be easier so you can keep psychic on cele to hit dnite. Hm and I think OTR rank and viriz can be played around to some extent just don't give the former set up opportunities with bad choice lock moves and play scizor carefully against the latter. Ok sorry if I start to ramble...good luck!
Ps Ttar crunch would help against cm latias too who can handle cbzor with HP fire / sub and recover up on your other mons.
who is this character