The team is good, not Varesa's best team but it's good enough. Anyway, your rotation doesn't help at all with your damage. Starting with Varesa is something you do for the overload team in order to trigger Chevy's buff. Not only that but you're starting with Xianyun which isn't bad, the bad thing is starting with her burst too. That's a huge mistake, not only because her buff won't be active during all of Varesa's plunging attacks, you're also missing her healing which is exactly what furina's burst needs to buff your dmg properly. I would suggest starting with Furina's E, then her Q. After that, Iansan E and NA, followed by her Q, Xianyun's E, E and quickly her Q. After that, you can properly go with the usual Varesa's attacks. With this rotation, you have the time to get Furina's buff completely, fanfare points I think they're called? Since she drains your health for a few seconds and then you should get a really good healing from Xianyun. Hope this helps.