There is no Dana.... Only Xhul!

Xhul'horac is a very challenging encounter, we knew this from our kill on normal mode! - In heroic there is a very high DPS requirement, there is also a strong requirement to move correctly as a team, to interrupt and also to deal with the other abilities like the singularities and the voidies in a coordinated manner. However in heroic mode it is very noticeable the damage coming from the explosion caused by mixing the two colours (or "crossing the streams" to continue the ghostbusters analogy) is exceedingly severe - whilst it's not "total protonic reversal" - two of these happening close together can easily lead to deaths and from phase 3 onwards controlling when this happens is very hard. In the end we changed tactics from our normal and shifted our heroism to phase 3 - once we did that and shortened that phase we were able to get the kill