I spent like 3hours gathering these shyts, but luckily got a 1717 ptorch for my first uber run today. I just wanna check if anyone has any tips on farming those keys effectively with a sorc.
What is the best way to farm for Hate keys? Is mindlessly teleing and hoping for the best for 25% chance?
What is the best way to look for forgotten tower? xD
For Destruction key, you can use the eye painting on the wall method to locate the boss.
What is the best way to farm for Hate keys? Is mindlessly teleing and hoping for the best for 25% chance?
Yep pretty much. The only tiny bit of help i can give you is that often you can take a shortcut from the southwest to the northwest part without going trough the middle. Might save you 1 second per run 
What is the best way to look for forgotten tower? xD
On each floor of the tower, the exit is always in left orientation of the entrance. Finding the tower in the first place is ehm, luck i think.
For Destruction key, you can use the eye painting on the wall method to locate the boss.
Its about the wall that divides the 2 lanes of each path. On the top 2 (NE and NW) paths, its the piece of wall that faces the central square that matters. On the bottom 2 paths (SE and SW) its the very last piece that dividing wall. The one of those 4 wall pieces that has the painting is the correct path.
What is the best way to farm for Hate keys? Is mindlessly teleing and hoping for the best for 25% chance?
Yep, there is no pattern with the Summoner. But there are ‘super’ chests in the false directions, they can have really nice loot and high runes.
What is the best way to look for forgotten tower? xD
Search the area around the waypoint in a small circle. Then go straight in any direction until you find a map wall. Tele around the map perimeter, the Tower is often located near the map wall. Then proceed to inspec ‘inner’ walls of the map. If frutless, find the Hole, and search the area around it.
For Destruction key, you can use the eye painting on the wall method to locate the boss.
There’s an awesome guide on diablowiki, here it is: diablo2 diablowiki net/Guide:Nihlathak_101_v1.10,_by_mephiztophelez (sorry, I can’t post links)
thanks guys, pretty useful tips there.