an idea would be to make it dependent on how many kills you get in battle as well as the gold for winning the battle.
For every kill you get that is not a assisted kill you receive 1 or 2 gold depending on type of tier ship if t1 then 1 gold t2 2 gold and so on.
If they are assisted kills then you would get half like 0.5 for t1 and 1 for t2 ships and so on.
For taking capture of beacon maybe 5 gold or so.
Also another suggestion.
For game logs a actual section where you can view your last battle and see in detail what you actually won for that battle and a brake down of everything.