A 68-year-old man with a 40 pack-year smoking history presents with chronic cough and exertional dyspnoea. Spirometry shows FEV₁/FVC ratio 0.58 and FEV₁ 55% predicted. He has persisting dyspnoea despite using short-acting Salbutamol as needed. According to recent Canadian COPD pharmacotherapy guidance, which long-term inhaled regimen is most appropriate?