diablo 3 how to use the infernal machine

I ran a few tests on the droprates and hopefully my input here can be of some help. I do realize that there already are several guides (and videos) going around with info on how to combine the Infernal Machine.

You must be in Inferno difficulty for the keys to drop.Last updated at 14:00:17 UTC Weekly Help Desk RAGE Loot Thread Trade Thread Key (and plans) Drop Rates: The drop rates for the keys will vary based on what Monster Power level you are playing on. By handle, I mean the Monster Power that will cause you and your friends to die less than 10 times each before you manage to kill him. Due to the difficulty of this Keywarden it is a good idea to fight him with a group of your friends on the highest Monster Power you think you can handle. The curse reduces the effectiveness of any healing that you may have by 75%. He attacks with a fiery spell that quickly drains your health, he has the jailer affix and he can curse you.

Nekarat is very hard to kill but luckily you only need him to drop the plans once. The plans for the Infernal Machine can be dropped by Nekarat the Keywarden in first level of the Silver Spire in Act IV. Xah'Rith attacks by making frozen corpses rain from the sky and if you get too close to him, he will push you away with a frozen breath attack. He always appears in the Raise the Catapults section of Stonefort which means you can use the Stonefort waypoint and then head to the right and up the stairs. The Key of Terror can be dropped by Xah'Rith the Keywarden in Stonefort in Act III.

He also will use his whirlwind blade attack on you. Sokahr has the missle dampening, vortex and mortar affixes. The Key of Hate can be dropped by Sokahr the Keywarden in the Dahlgur Oasis in Act II.

Diablo 3 how to use the infernal machine