With the advent of 1.5x drop rates influencing coin dungeons overlapping 10x plus egg drop rates in descends, we are given a new (and highly lucrative) opportunity to farm plus eggs. The 30 stamina Tengu Descended from the coin dungeon tab is now one of the more viable places to farm plus eggs. In fact, it is the most efficient place to farm in terms of stamina/plus egg (7.03 stamina/+ or 4.27 pluses per completed run) and only loses value due to granting very low rank experience.

Descend	Floors	Average +’s	Stamina/+	Exp/Stamina
Tengu 30 Sta.	5	4.27 (3-5)	7.03	212

Full breakdown of all the descends can be found HERE. However, Tengu is incredibly easy to clear for players of all skill and progression levels along with having the opportunity to be push-button farmed. Clearing the dungeon faster does not yield more pluses, it simply lessens the mental capacity required and eases your sanity. Below is a video of my pseudo push-button team:

My team has just enough skill boosts to allow me to use Red Odin  on turn 2 as the auto kill from Awoken Ra  and Lu Bu  do not reduce the cooldowns of my other team members. Yamato  is purely used for the 3 skill boost  awakenings. Your team can differ and you do not need to push button every floor, it just simply saves a couple of seconds here and there.

Full mathematical breakdown of Tengu’s efficacy was compiled by Michael Yano, Jeffrey Lee and An Do:

Best of luck in your plus egg endeavours.

Happy Puzzling!