>>535744773
>>Like you can't even consistently kill them.
Copypasted from sequel bin:
Get to Connecting Spire (renamed to Binding Spire in ENG 1.3.0) in the postgame by doing Lione's request. The Connecting Spire is to the east of Crystal Settlement's transfer sword.
As you climb the right side of the tower you'll find a switch, and this switch opens a room to the south of Connecting Spire's transfer sword that contains nothing but Chickeners.
The easiest way to kill Chickeners is to respec your characters to be two Queens with Emboldening Command and two Assassins with Search Shot, as well as Mechanic's EXP boost passives on everyone. You may still have trouble killing Rare Chickeners before your first reincarnation; try to get a strong 2H Bow for both Assassins, and unlock Striker's ATK passives and Assassin's crit chance passives on them. If you're too weak to kill Rare Chickeners, Emboldening Command combined with Royal Bind, and then followed by a DEF-ignoring attack on the next turn like Warrior's Breakdust skill or Striker's Striking Blow skill will allow you to kill them no matter your level.
Always run away from battles that only have regular Chickeners since they're a waste of time to kill.
It takes approximately 110 Rare Chickeners (around 7.6 million EXP) to reach level 99 once, but this process won't take you very long if you approach it the right way. Personally it took around 40 minutes per reincarnation once I had the method down, and the first trek to 99 takes the longest.

Yes it's annoying as fuck in blight, but you really don't need reincarnations for anything other than Mother of All Life (and she's doable without reincarnations), Terrifying difficulty in NG+ and Being of Myth (who is balanced around the +1 gear from terrifying anyway). I thought the chicken grind in awake and kludge were worse IMO. At least hakika made them incredibly easy in both IR and thirst.