Nuclear option is primarily oral dutasteride and oral minoxidil. Topicals like RU and nizoral can have a bonus effect. Oral rogaine aka minoxidil is the absolute most potent hair growth inducer known to science and medicine. (much more effective than topical)
There are many effective and highly customizable approaches for male pattern hair loss. You can play around with fina/duta dosages and frequencies ie 0.25 mg fina daily or 0.5 mg duta MWF, and they can also be used topically with good effect in many people.
Like
@blackjack said, a therapeutic dose of adex can prevent gyno with minimal to no side effects. The goal with fin/dut is to use enough to prevent or reverse hair loss while minimizing/eliminating sides. Fina and duta are actually more like aromasin, they are actually steroid hormones themselves which grab onto the 5-alpha reductase enzyme like aromasin does with aromatase enzyme.
Many guys get zero side effects on full dose finasteride/dutasteride, but many guys also get bad sides like brain fog, sexual effects, etc on the full dosages.. Studies and clinical experience prove that very low doses of finasteride and dutasteride are very effective at reducing DHT and stopping or reversing hairloss. The more you take, the higher your risk of sides. A lot of these sides are from the fina/dut themselves and not the reduction in DHT.