Whats more commonly used in practice today to treat atherosclerosis, antiplatelets, anticoagulants or fibrinolytics?

Statins: Actually, it depends. Atherosclerosis is clogging of arteries so statins are probably most commonly used to lower cholesterol while antiplatelets eg aspirin are used to prevent heart attacks as well as stents from clogging. Anticoagulants eg warfarin etc are typically used to prevent clots in legs & strokes from atrial fibrillation. Fibrinolytics are used to dissolve clots once formed.