this is by far the best guide out there, i use it too (with last wish eth cb then on merc)
as for eni over wealth, this is not neccesary. i control my merc perfectly without eni, you just got to get good
at leaping and running etc. eventually you will know how to control your merc.
for example sometimes 50% councils are inside and 50% outside. not a problem at all:
solution 1: enter/exit durance lvl 1 when room is clean and walk to other group, through door.
solution 2: walk to the lower corner of the room and merc follows you, then walk through door.
solution 3: just go outside and stand at the upper corner of the doorway. merc will hit mobs through wall (haxx?)
then eventually kinda teleports itself to your location.
phys. immune? -> dont hesitate, hork what u can hork, take cash, exit and remake. (dont go waste time on this..)
even with an eni this is annoyin since that phys immune is like a magnet to ur merc.
also, try to leap in a smart way: as if ur the sheepherder and councils are your sheep. get them together. (its really easy to do)
if you pause your leap too long they might heal eachother so dont do this too often.
control over your leaping and control over your merc makes this build the best for sure.
theres tons of these tricks to make goldfinding so much easier, man i could write a whole guide about it...