Here is what I would do.
Saturday (1 week out): Key race simulation brick. Bike 45 mins with 3x10min at race pace, straight into a 20 min run, 10 mins race pace, 10 mins cool down.
Sunday: off/rest
Monday: Bike or swim. Include some harder intervals
Tuesday: Run easy with strides
Wednesday-Thursday: Bike with some short intervals (3x3 mins) to prep the system
Friday: Easy or rest
Saturday: Short ride to make sure bike is all good to go. Include short bursts up to race effort. Swim open water 10 mins on the course
Sunday: RACE!
Saturday (1 week out): Key race simulation brick. Bike 45 mins with 3x10min at race pace, straight into a 20 min run, 10 mins race pace, 10 mins cool down.
Sunday: off/rest
Monday: Bike or swim. Include some harder intervals
Tuesday: Run easy with strides
Wednesday-Thursday: Bike with some short intervals (3x3 mins) to prep the system
Friday: Easy or rest
Saturday: Short ride to make sure bike is all good to go. Include short bursts up to race effort. Swim open water 10 mins on the course
Sunday: RACE!