I know I've said this the last two times, but the drop rates are NOT broken.
Maybe not the drop rates, but the spawn(finding a LE) rates are terrible.
Spending 10-11mil gold and only hitting the LE 20-25 times ... How is there nothing wrong with that? Keep the drop rate low, increase the spawn rate please!
There's too much other "effluent" in the caves now, shall we say...
There needs to be either (ideally) a 3rd cave, just for the specials (at a higher fee of course) or some sort of sliding scale that, the more you spend per scavenge the more likely you are to get the creature you want ...
Let me try to rephrase that ...
Have the "dross" monsters as the first tier - sneak and others, available for 5-10k / scavenge at 100% chance of them appearing
Have the 2nd tier monsters available for 10-15k / scavenge and they will appear, say, 50% of the time whilst the dross takes up the 50%
Have the 3rd tier monsters available for 15-20k / scavenge and they will appear, say, 40% of the time, with tier 2 at 30% and tier 1 at 30%
Have a 4th tier monster, available for 20-25k / scavenge and they appear 40% of the time, with tier 3 at 30%, tier 2 at 30% and tier 1 not appearing at all.
Each higher tier does the same as tier 4 - so, for instance, a tier 6 monster would have :-
Tier 6 - 40% of finding
Tier 5 - 30% of finding
Tier 4 - 30% of finding
Tier 3 - don't appear at all
Tier 2 - don't appear at all
Tier 1 - don't appear at all
My 2c