SOS and JOKER

The ranking is based on the ranking position and not by march strength.

The march strength shown is just an indicator of how much total march strength players have.

The total strength is the sum of your three marches. At the start of the event, the system will prompt an automatic march set and the troop formation is at 3/3/3. Players can modify the hero combination and the troop formations anytime. The winner of the battle is decided by winning 2 marches per battle.

Aside from this event is mostly for spenders ( better stats, better march strength), this is also a battle of strategy. Most players will set their marches as : 

March 1 - Strong 
March 2 - Strong 
March 3 - Weak

And since this event is best of 2, player need to make sure to win 2 matches. 

To counter that, set your strongest on March 2 to get a better chance to beat their second best march , and set your weakest march in March 1 and your second best on March 3. Possibilities are endless :p

Skills work in Arena of Doom and so are the settlement buffs. Effects of the buffs are dependent on their respective duration.

F2P? Only use them on day 1 if you are going after the Breakthrough Rewards. Players can just ignore day 2 and onwards since players only get vouchers for every first 3 attacks daily regardless of ranking.

Once the event opens, all settlements are owned by monsters with low level march strength. So the goal is to get the highest all – time high rank before everyone is able to.

At reset (day 1) attack as many as these monsters before everyone else. But instead of attacking the monster next to your settlement, span to the right and attack the monster next to the Top 10 instead. Attacking the settlement next to you is a waste of your attack chances and will likely not give you the breakthrough ranking you aim for.

F2P/Lower Spender: Spend all your attack chances on day 1-5mins after reset to get the highest ranking as you can. whatever ranking you reach after 15 attacks, that will be your all time ranking unless you beat another player above your rank.

Use the free chances on day 2 onwards only to get your FREE vouchers. No need to buy extra marches as after 3 attacks daily, there is no reward unless you are going for daily or final ranking.

The reason why Tens are better than drawing by ones its because this event is based on RNG .

So say if 1 voucher = 0.1%, drawing 10 vouchers will give you 1% chance.

Dependent on luck, player can either unlock the hero automatically or drop more fragments.

Extra fragments are also given based on the number of vouchers used.