i use thé masochist way if you dire retry watherver you're not ready

here i copy it for you how to defeat shika and funeral

Q: How does the raid battle in the fire area against Funeral and Shika work?
A: 
- Talking with the blonde elf before the raid gives you the option to teach Elly or Mirel
the Mark Target skill. By using this skill on one of the boss enemies will focus all 
damage attacks from the raid group on that target instead of switching between them. 
- If you decide to go left at the first battle, your healer will be knocked out, causing 
you to miss heal and buffs in the boss battle. 
- When you decide to go right and save the healer, resting will have a 2/5 chance to 
heal you up without having to fight again. Else it'll always be a thrid battle against 
small flames. 
- Staying at distance against the firewalker will do noting good but reduce the mana of
your entire party. I plan to change it after X-victories that your raid group became 
"strong enough" and you can reduce his HP greatly on range and then finish him in 
close combat. I like these kind of changes to make sure the choices are not always 
clear or stay the same way all the time. 
- The boss Shika will have red or blue glowing hands before the battle. Red hands 
mean you have to wait before attacking while blue means you have to rush in 
immediately.
- The box of ash from the firewalker enemy is needed to remove the invulnerability of 
the boss. 
- Funeral can be silenced to stop her fireball, but every 3 turns Shika will check if 
Funeral is silenced and will cure it if she has it. 
- Shika has mana regeneration but not much MP in general. Burning her mana can 
prevent her from casting her aoe spell. 
- Funeral has more physical def, Shika more magic def. Since you only need to defeat 
one target focusing on whichever you can kill faster makes sense. 
- The burning debuff does 30% Max.HP damage after the characters action, so it can 
always be healed before it triggers. 
- You can get water bottles/buckets against the burning debuff from water fairies in 
front of the dungeon (and later at the earth or ice area raid once it's done)
- Each piece of clothes has 5000 HP, and you need to destroy three pieces, which

means their effectiv HP is 15000 each.
- After the battle the healer offers to heal you, which also recovers your MP.
- Legendary equipment has a 15% chance to drop but is always unique. If you roll a 
legendary item you already have you'll get another one from the list until you have all 
of them from a chest. Then you'll get epic (purple) items even when rolling a 
legendary loot.