Darksiders: Wrath of War PC Cheats and Tips

You need to direct the beams to those skulls surrounding him

Harvester is the only one I've found it unlocked the scythe early or if it's unlocked it reduces the price to zero souls.

Well over by where the gate guardian is to the left there is hole with demonic growth on it go down there and go through the underground parking lot to the top and then put on the mask of shadows and get the Armageddon shard.

(you will be in the right place if you start fighting a demon with a shield)

You get it when you go to verse that giant worm in the ash lands just before you verse the worm king you have to take on countless enemies untill you verse the red armored guy on your horse ruin beat him and you should be able to use ruin the red horse.

You can't. The game is not designed that way. The way you're describing it, you are trying to, like in assassin's creed brotherhood and revelations, work it so you go back to previous point in time, get something there, and have the item you went and got when you go back to the point in time from where you went back. If you went back to before you had all the armageddon blade peices you'll have to get them again. So, yeah. Shot urself in the foot, there...