If it comes down to water vs thunder in an actual battle it is an obvious win for thunder. But the team overall on itself is better with a team turner than thunder because of all the assisted wavers that are available to use.
I"d not be so sure if Thunder wins over Water… it really depends on the speed of the monsters… Water has more Assisted Moves. if Water gets a team turner monster things could be way different
For the Lightning one are both the assisted mons necessary? Obviously it would help but is it viable with only one?
I have both of them but currently i’m only running with Godfeather in my frontline for the sole reason that sleep killers continuously kill Velocirex. not having Velo would not be an issue seeing as how often he dies before even doing something ~ not having godfeather on the other hand would prove to be quite problematic
This is ofcourse given that you have Zephyrox… if you do not have him then don’t bother 
I have figured out a way to always get a assit from velo and remove my front line weakness to sleep killer, but if you have more water monsters then energy or lack a fast godfeather or zephy, also don’t bother with holy unless you have aegis and anubi, night night is still probably the best option for pvp and if you have it aegis and oni
So call of thunder
Unbreakable sleep
Night night
Are the best combos
But it’s all about working to your strength pvp is different to online all monsters can be game changers
I have godfeather and zephyrox, not sure which else to put in with though,
Grimowl can be used as well, he is electric and has give turn. He has dreamhunt, but no sleepskill, so not vulnerable to sleepkillers. But he is complementary to velocirex with his dreamhunt. Although you will probably use assisted thunder more than his sleep all.
You’re using Blitzdragon as part of your frontline and hit stepback to bring in Velo just before Zephyrox can team turn… Am I right? 
at least i was thinking about this possibility to protect him that way… sad part is… I don’t own blitzdragon… god I hope they bring that event back…
Yep that’s it lol
And the rest of team is pretty much made to make sure I get a few more assit off and if all assist die I have a solid mid to end game team that can turn games around
it works surprisingly well
Water would lose to thunder but only cause of the attribute difference, take that away and water honestly has a lot more options and better quality monsters that can fit in in general.
I think it’s good that they’re not all exactly equal and sort of (I guess at least meant to be) balanced in other ways.
Water has more assisters
Lightning has a team turn and element advantage Etc