With a jammed collective, it's all very well to talk about getting speed low to start descending, but when you get close to the ground and decide to reduce the rate of descent, you have to poke the nose DOWN to build up speed - and the rate of descent gets very scary.
Keep the speed changes small and the rate of descent small, to stay close to the bottom of the drag curve.
Regarding the "Quacking" that you have to do to "Bloggs", I always found it useful to acknowledge/pretend that Bloggs had already done the preceding sequence, been debriefed on it, and had the pre-briefing for the current sequence. That way, instead of trying to explain inflow roll while you are flying, you say "OK, Bloggs, remember how we looked at inflow roll at the end of yesterday's flight? Good, so here we go..."
Or when your instructor says "Sir, can you explain dum de dum.." your reply is "Come on, Bloggs, we went through this yesterday" and you can cut out half the horsefeathers.