Either use decoction to raise temp for each rest, or use water infusion to bring it up to temp. Another option is to direct fire the kettle with the mash inside.
Key is to produce an intensely dry beer. Using single decoction mash, or to do 3 small decoctions.

Preheat tun with strike water for 5 mins with over heated water- just add water that is 4f above target strike temp and wait for it to reach strike temp then add grains.

Notes:
fix ibu for target 23.5
target og is 1.057-1.060 and target fg is under 1.010

compensate for temperature loss and no sparge - efficiency is 70% instead of 74%.

mash proceedure: - 10.77 pounds excluding sugar.
Strike for 145F, after 25 mins, draw a decoction of desired amount + 10 percent more for boil off during 15 minute mini decoction boils.
order is this:
1.7 quarts for step to 150f () - predicting 2f loss
2.0 quarts for step to 155f () - predicting 1f loss
2.4 quarts for step to 160f () - predicting 1f loss
Keep boiling water on hand to raise temp if needed.

research yeast
Bump up IBU to 25/26
Read about how to do decoction mash and boil off losses during processing
Add roasted grain in last 5 mins of recirculation.***