FIsh and Gas seem to be useless compared to most other resources. Sure,they have their use,preventing morale loss,but they do not do much more. Take,for instance,coal. Coal is very important;we need it for railways and also to build Battleships and Railguns. Or Wheat,or the construction materials,or oil...without them you could not win
Gas just seems to have not much use;it is only used to build aerodromes and Observation Balloons. Of course,Aerodromes are important in the late game,but with the stock market,you could just set the resource slider for gas to the furthest right,thus increasing oil and coal production,and buy the gas for the Aerodromes instead.
As for fish,well,it's only use is to produce cavalry and sustain them. It may be important for an early game cavs rush,but other than that,it does not do much.
Im a pretty Mediocre player 
Tbh I still feel like zepelins should be gas run bombers bu8t then it nocks over the existing balance and a huge unit balancing redesign would be needed. For fish I think an army should also be able to run on fish but that is basically what you do with the fish-grain distribution take grain from the people give fish back.
Here is the way i Prioritise resources,with the most prioritised resources at the top.
1-Lumber-Iron
2-Wheat-Oil
3-Coal-Fish
4-Gas
Im a pretty Mediocre player
Gas is even more useless than fish,because in my opinion,if you want to build Aerodromes and Balloons,you can just buy some Gas in the Stock Market
Im a pretty Mediocre player
WarriorguHere is the way i Prioritise resources,with the most prioritised resources at the top.
1-Lumber-Iron
2-Wheat-Oil
3-Coal-Fish
4-Gas
Depends on the map truly the older maps usually have oil as their main lacking resource the bigger maps (100p/500p) tend to have Iron as an issue. I agree fully with gas hence the zeppelin thought
Gas were important starting day 10 or 20 start building airforce will need airfield in your lands
I general start day 20 I have 6/8 factory 4 to build fighter slow in they building queue . Depend situation map you will need them and with gas build or move them to the location need. On my last 500 I hold solo they front from Siberia down to Afganistan with airforce against 5 enemy players. I let my ally focus other parts holding them on my front decimading there army. I had 1400 fighter with 500 bombers
good luck brake they defend , From 750 city I had 725 airfields
Enforcer(Angel of Death)
BobokilGas were important starting day 10 or 20 start building airforce will need airfield in your lands
Well,if I want to build Aerodromes and stuff,I always buy Gas from Stock Market
Im a pretty Mediocre player
BobokilGas were important starting day 10 or 20 start building airforce will need airfield in your lands
1900 planes - 2 days and they are dead if you give me 500 fighters
I find Coal - the resource I lack the most on maps. Especially if you need fleets
