DeathRide is roughly 18 weeks away so big picture it looks like 16 weeks of training and 2 weeks of taper. How much experience riding and training? What is your W/kg? For example at ~3W/kg I did 8 hours climbing on DR. For your 18 week base, how much volume did you end up doing? If you kept with FasCat plans that might look like SS4 (vo2max work) and then Climbing Intervals. With TR use PlanBuilder or do something like SSB2 (because you already have the 18 week base) followed by sustained build. In either case you should be getting more specific to the event so I would start doing longer climbing rides on the weekend if possible.