I'm sure there are ranking rewards. And winning in defense, as mentioned, supposedly gives a defense victory point. Not sure if there is a ranking or reward for number of successful defends.

Basically for attack you need stamina : you need a 3 battle slot from the event exploration, whereas in defence it doesn't use stamina.
Attack give 1 to 5 Perot roller ticket depending on the adversary total SED and defence always gives 3.
Perot roller ticket is similar to a gacha, but for the event.

This event is considered in Japan as the friendliest one for beginner players. Cause you don't need to have high total SED but 5 card with 4000-6000 SED to have a pretty high win rate.

We don't understand everything especially because the event have change quite a few times and the JP wiki have still some data from theses past versions.
Like Kotono I think there will also be a ranking with for sure rewards.

Interesting, so you basically want to be attacked as much as possible and successfully defend from it so you get tickets. Okay, thanks for explaining

I read about the event and come up with this (Some thing might be wrong):

If you build a Moe deck you will try to attack Sexy players all the time and you will be attacked by Babe players almost all the time.

If you build a Sexy deck you will try to attack Babe players all the time and you will be attacked by Moe players almost all the time.

If you build a Babe deck you will try to attack Moe players all the time and you will be attacked by Sexy players almost all the time.

Moe decks with 5 strong Moe Cards will gernalely be the stronges Moe deck when attacking but very week in defence.
Moe decks with 3 strong Moe Cards + 2 Sexy cards be weeker in attack but strong in defence.
Moe decks with 4 strong Moe Cards + 1 is between the 2 other moe decks. This is a good deck if you dont want to change deck between each match.

If you attack a player with strongest defence (3-2) you should proberly go to strongest attack (5-0)
If you attack a player with medium defence (4-1) medium attack (4-1) should be enogth
If you attack a player with week defence (5-0) week attack (3-2) should be enogth
You cant see which of the 3 defence mode defender are using before attacking.

Only advantage of Moe is that you need need to level Moe girls up so much before getting high power levels.
So new players might have a small advantage by playing Moe.

So basically having mainly sexy is the way to go if you are capable of having lvl 100 sexy ones? I have one lvl 100 sexy card already as well as a babe, with two moe and another babe sitting at 50-80. Furthermore i have like 30 lvl 5 wild cards plus a fair deal of other ones.

In the second example deck (3 Moe + 2 Sexy), why choosing Sexy cards as filler? Assuming that an offensive Moe deck should be attacked by Sexy decks mostly, then using Sexy cards as filler won't add anything to that matchup. Shouldn't be better to fill with Babe cards instead?

Maybe I'm missing something, or maybe I didn't get the Moe v/s Babe v/s Sexy specific advantages, but If a Moe Deck attacks a full Babe deck, adding Sexy cards should give an advantage to the opponent deck. And if that same Moe deck gets attacked by a full Sexy deck, then having other Sexy cards would cause a match only based on lvl.
Filling the Moe deck with Babe cards wouldn't cause any advantage on the offensive, though, but at least won't give a disadvantage, and should give better chances when defending, too.

Please correct me if I'm missing something, I'm starting to get confused xD

It would seem that there are two goals in this event...
Win when attacking. This should be straightforward if you have at least three reasonably leveled cards with the same attribute.
Win when defending. This is substantially less straightforward, as its a mixture of getting players to attack you, and having a set of cards that is capable of winning despite the information the player has when choosing who to attack.

The information given... center card, rank, and attribute (moe, sexy, babe, none) is enough for a player who has leveled three cards of a single attribute sufficiently to only choose battles where they can win (unless no battle is available as a choice). So I'm really not sure what the best strategy for defending is... choosing a grouping without an attribute has the best chance of winning... but likewise seems like it would deter players from attacking you, which isn't desirable...

*shrug*

*edit*
Actually I made a mistake in reasoning there, you need a full set of 5 cards sufficiently leveled if you run into a *trap* deck, since in that case every you need to win all of the matchups where your cards have a strong matchup.

A Moe defensive deck will be attack by Babe deck (Moes are strong against Sexys and weak against Babe).
When your card is strong against another it SED (seduction) will be threefold, so your card only need a third of its adversary SED to be able to win.

That's why I want to use 2 Sexy, even if I have 3 card that will be likely to lose the 2 Sexy will likely win + the bonus card from friends it mean I can win if I'm lucky xD

The base of a trap deck is to lure people with 3 card of a attribute (you need 3 to get an attribute on your "profile"), and then use 2 card of the attribute which will be strong against the one that the attacker will be most likely to have.

The reason why you want to be attacked is because you lose nothing if you actually lose the defensive fight.

EDIT : As far as I know, before fighting you can only see your adversary general attribute (Moe, Sexy, Babe or none) and not the actual cards.