I have much experiance in this area. Pre pulling lube is a bad idea because your rope will be worthless on the tugger. three 90 s are nothing - lol pulled through many more than that -straight through J boxes , manholes etc.
you have to consider the forces involved , bracing boxes , chaining pipe at stress points, the tugger can pull 10,000 pounds of pressure, red lines at 7000,, tuggers in series , winches, things start groaning and popping at that kind of pressure, ropes need to sized right, tuggers need to be moutd SECURELY - this is NOT for a first timer -
people can be hurt, equipment can be damaged.
Make sure you tie the basket correctly or we will be pulling the wire out -BAD -VERY BAD- they do have some newer methods of securing the cables, like little missles that are staggered and secure the wire and upon pressure dig into the copper itself.
I have seen enough go wrong and some terrifying stories of bad pulls to know how to do it . Notice I did not say the correct way or safe way -everyone is different and everyones degree of safety is different.
They have some mechanical feeders out there can be rented -worth the money can take the place of 4 men when pulling 500 mcm and up.
Stay safe !!