In my opinion, combination of both luck and strategy will lead to a greater result. I think it's better if they work side by side. It's not like, luck is always on your side, so it's better to also have a strategy and vice versa. But, I think it's also about being wise—knowing when to continue and when to stop.
Luck will always overcome the strategy in gambling.
If someone has luck and no strategy , he might still be end up winning in gambling. On the other case, a person with no luck and good strategy may still lose even after applying good strategy only because of his bad luck.