What do I review before adding volume?
The training you have sustained, the time available for long sessions and how you recover from them. A week that requires borrowing sleep is not the baseline I would use.
Where do bricks fit?
Give each brick a purpose: transition practice, controlled off-bike effort or a race rehearsal. More demanding running after every ride is not automatically better training.
How does the final block change?
Keep race routines familiar and reduce fatigue. Equipment, travel and fueling decisions should already have been rehearsed before taper week.
Where does this guidance come from?
See the source below for the underlying rules or evidence. Practical training advice should be adapted to your experience and circumstances.
Use the related calculator