Regardless of how good or bad the new ending of Mass Effect 3 was going to be, people were still not going to like it. Personally I didn’t have a huge problem with it to begin with, although the game didn’t have what previous titles had. The immersion value wasn’t there, the characters were a bit shallow and overall I didn’t have an engaging experience.
Some enemies in Mass Effect 3 have instant execution moves. The Atlas, Banshee, Brute and Phantom can kill you instantly when you let them get close. I have never seen the Geth Prime doing this, but I have been teleported towards a Geth Prime before as though it was going to execute me.
Grenades are incredibly useful in bad situations or when you find a bunch of enemies. Cluster grenades set off biotic explosions, but you have to use another power like warp or reave to initialize the explosion. I have cleared out whole rooms of enemies with a single throw of cluster grenades after using reave.
I certainly think that the absolute best way to grind credits is on the gold challenge with another friend. One of you plays as a vanguard and the other uses warp/reave so that the vanguard sets off biotic explosions. But often I find myself wanting to unlock more gear quickly but no friends wants to play with me.
That is when I decide to bring out my special vanguard build and play against the geth on the silver difficulty. It doesn’t really matter on which firebase you play, but I find that firebase glacier is the easiest and fastest to finish.