I’m not sure what gear u use, but I recommend SSR for the left side, and R for the right side. Don’t use ssr for both sides unless you b u y lots of diamonds.

For the gear’s 追加効果, aim for all the same bonuses. For example, the top 2 gears should all be ATK +2% or above, the middle should be DEF +2% or above, the bottom should be HP +2% or above. This is where using R gear comes in handy. You don’t need to spend diamonds to change your 追加効果. If you have extra gold, aim for 2.5% above for the R gear.

Awaken your characters to at least 4. The last 2 may be harder cause light chalices are not easy to get.

Level up your characters to level 70

If you follow the above, your gears’ 追加効果 should have at least 20% bonus to your ATK, DEF, and HP (depending on your luck). The base stats for the gear should also grant you 1000 for ATK, 700 DEF, and 13000 HP. By then you should have around 120k CP.