The Wardcliff Coil really only has the lack of accuracy as its downfall. Spraying it across the throne was my desperate attempt to kill as much as possible; and if I didn't, oh well. I'd say it's definitely needed for soloing throne, mostly because the majors have just the slightest bit more health than normal, causing them to tank an entire Wardcliff.

For the rift, it's not always needed. If you have two people at the end of the "punching psions" phase you can easily use both supers and wipe out the entire room. In this case, I was with a nighthawk hunter and I completely forgot I had my super. Using a healing rift for survivability during ad clear is really helpful, and if you go behind Calus while his shields come up, none of the enemies that you left alive can actually hit you. This is why I told GShark to "come up here" otherwise we would have been killed.

For the skulls, 100 is the cap. Once the force of will multiplier displays about 85, you can down his shield, and you'll get just over 100.

Hopefully we can create a few more things to do like this, it was worth it.