I will say that certain tasks should be changed a bit, like trading could do with a little less drachma (I say a little since the exploration task grants valuable armour that can be sold for a fair amount, to the point that it can be good enough to fund the fleet while just generating sealed chests.), fishing definitely needs to have more food generation than recovery or plunder/patrol, conquer or whatever the dark sea one is should have some sort of mechanic where the further you go into the dark sea the more loot you get passively to add a risk versus reward factor, but in turn lower the passive loot when out of the dark sea.