Cardes is the 2nd of the 4 fallen gods you must defeat in the Quest storyline. You must defeat Cardes in the end of the Palmyna area.
Mono squads can be used to defeat Cardes and is one of the easiest ways to do so. Using a mono squad means you bring Ores and Seals as buffs. You can battle Cardes the same way you battle other bosses since there is no HP Threshold BB attacks. Guarding when Endless is casted is suggested (Endless casted on first turn and every turn after Cardes heals himself). Other than that, bring holy waters and feel free to do all out attacks.
You can fight Cardes the same way you fight any other boss with a crit squad EXCEPT, gaurd on the first turn so if you dont kill Cardes, your squad wont die before reaching the 2nd turn. Other than that, just attack him the same way you attack any other boss, Crit Buff, Att Buff, Hit as hard as you can and pray for crits.
Rainbow Squads are also recommended depending on the units. For a Rainbow Squad against Cardes, you should have units with Defensive Buff and 1 with heal. The rest can be Hard hitters or more buffers if you see necessary. Having Oulu wont be nessasary for this fight since Cardes does not have a HP Threshold BB attack. Bring Holy Waters or a unit with status nagate. Guard every turn he uses Endless and other than that, Feel free to beat the ever loving strawberry custard out of this legless god.
If you have any questions feel free to ask me and i'll answer them to the best of my abilities. Also, if you're having trouble with another boss send me a PM and i'll get a guide done as soon as i can.
Cardes is a hella ugly.
And I thought Maxwell was horrible.