Should you struggle with the sudden power increase from enemies in the later part of the game (e.g. moon boss), here's how you can quickly grind the arcana needed for a quick power up.
what you will need is:
-the faeeffect slot which you get upon having fae regain her original image
-europa's milk
-europa's mimic underwears
-kaatriv's spellcloak
-access to spellbinding
-having all (4) challenge blooms related to lewd arcana unlocked (these are found in the first dungeons)
by putting europa's milk in the faeeffect slot, it will result in starting each battle with shield, this is important for later
equip europa's mimic underwear in your first item slot (or second, doesn't matter)
spellbind kaatriv's cloak to make it give more lewd arcana instead of arousing monster, equip this item in your other item slot
activate all arcana challenge lewdblooms, this will result in:
-all spells being level one, this does not matter
-monstergirls hit harder, this doesn't matter either
-monstergirls are tougher, neither does this
however
this will also result in monstergirls exploding on fuck, resulting in damage for the user and surrounding monsters. this is why you equipped europa's milk in the fae slot. this way you start with shield, foregoing the need to shield yourself at the start of each battle
remember to go naked into the dungeon of choice
personally i believe the slime dungeon (up, down. up, down, up) is the best choice due to the slimegirls immediatley wanting to fuck if you're naked, foregoing the need to injure them first.
for even quicker farming, use Q when in the fuck scene to skip it.
remember to not engage in a fight with the slime boss as it is just a waste of time
when you want to leave, leave with the button at the top right of your screen below the clock that says 'to academy' to skip the succubus talk.
this should give 165 lewd arcana per fuck and 50 per pickup.
if you find improvements/better ways to farm lew arcana. please tell