An 82-year-old man with long-standing type 2 diabetes, ischaemic heart disease and mild cognitive impairment lives in residential aged care. He is on basal-bolus insulin and metformin. His most recent HbA1c is 6.3% (45 mmol/mol) and he has had several nocturnal hypoglycaemic episodes. According to Australian diabetes guidance for older people, what is the most appropriate glycaemic management strategy?