Making Turn1~5 weaker isnt need. Already get nerfed by having stronger equipment in the game and content will be nerfed as soon as level cap is risen.

Sure theres small adjustments they can make Turn5 easier such as making Conflag attackble as soon as it targets someone, lower the hp of everything, longer conflag timers, less knock back damage from divebomb,less dmg from arena barrier,slower moving dreadknights, snake adds die faster.

These nerfs I expect to happen to turn 5.

Turn 1...? 5 stacks being cap for the boss snake,Samething with turn2 ADS.
Turn 2...? Longer swap timers for rod./ADS mobs dont have paralize or do as much damage with that attack.
Turn 3... Golems dont aoe if your not in attack range.
Turn 4...? Less mobs drop at once/more in a order,less Spiders,less HP on mobs.

Probably see something with ADS nerf so players can take jobs without a brd or plds.