I feel like it doesn't even matter if your team is good since the game is way to easy. You could probably just use a Dunsparce and still manage to beat the game. Also, you're using a lot of strategy (Luvdisc supporting, Reuniclus with the double screens), but the in-game part requires little to no strategy at all. Honestly if you know your type charts well, you don't even need that much stuff since the game is just programmed to go for the most effective move without ever predicting and/or switching. However, besides that, I will point out some of your team flaws, even tough I really don't think you will have any problem in game at all.
1- Your team is weak to Ghost, Dark and Dragon.
2-Some of the items are kinda weird; Chesto Berry on Kingdra is pretty useless since you do not have Rest and you can use Full Restores. Focus Band is not a reliable item since it's based on luck, but it's still useable if you want.
3-Dragon Dance doesn't boost any of your Kingdra's moves since they are all special, so it only boosts your speed.
4-I don't think that Iron Defense on Aegislash is useful since it's already really tanky, you could instead use something like Shadow Claw/Sneak. Same goes for Charm on Luvdisc, I don't think Charm is good, but it's still more useful than Iron Defense on Aegislash.
There's probably more things that could be changed, but these are the major flaws. With that being said, good luck on your playthrough.
PS: Sorry if I sound harsh, I don't mean to be offensive or anything.
1- Your team is weak to Ghost, Dark and Dragon.
2-Some of the items are kinda weird; Chesto Berry on Kingdra is pretty useless since you do not have Rest and you can use Full Restores. Focus Band is not a reliable item since it's based on luck, but it's still useable if you want.
3-Dragon Dance doesn't boost any of your Kingdra's moves since they are all special, so it only boosts your speed.
4-I don't think that Iron Defense on Aegislash is useful since it's already really tanky, you could instead use something like Shadow Claw/Sneak. Same goes for Charm on Luvdisc, I don't think Charm is good, but it's still more useful than Iron Defense on Aegislash.
There's probably more things that could be changed, but these are the major flaws. With that being said, good luck on your playthrough.
PS: Sorry if I sound harsh, I don't mean to be offensive or anything.
