I've heard that in later ages the imbalance between supplies and coins gets pretty significant. I don't think its unreasonable to get LoA during the early ages when your town is still small and then add a RAH in later ages when you start running low on supplies. Not speaking from experience here, just anecdotal things I've picked up from other players.
After some events and expeditions you'll get enough soks and similar buildings which will make your coins production higher than your supply production (it is not necesarily an age "problem". But that's something that happens and isn't a big deal. These soks and skw produce more FPs than recurring quests anyway.
And, while it's true that RAH can increase the overall FP production in some cases, it isn't good enough to be leveled before 80 arc. And after 80 arc, the spent FP quests outnumber any UBQs derived from your city production BY FAR. At that point in the game you are far better powerlvling your CF than lvling RAH.
I have a few questions relating to POST 80 arc. Perhaps you can give me some advice.
1. There will be no more reason for staying in HMA right?
2. Which era would be good to park in next?
3. After building the must have GB POST 80 arc should I level them one by one or is it also okay to get them to 10 and afterwards leveling them one by one?
Thanks
Objectively speaking.
The reasons to remain in HMA after the 80 arc are:
1. Higher amount of spent FP and Feedback UBQ quests.
2. Higher amount of the other quests as well.
3. Hardly ever you get plunder
4. The FP used for tech can be used elsewhere.
The reasons to leave HMA are:
1. You can sell high era goods for FP, which is a highly profitable business, specially in new worlds.
2. You can participate in high eras GvG
3. Your overall contribution to your guild is higher (more guild power from expeditions and GvG, arc pumps high era goods)
Subjectively speaking.
-If you have the time and will, I'm pretty sure than a tech sprint of several eras + CF powerlvling is the most effective way to increase your lead.
-If you aren't going for that route, advancing eras doesn't provide any self-benefit. So, either advance to help your guild or stay in HMA. This is what I have done, I'll only advance when I have too many good special buildings (SoKs, TFs, SKWs,etc.) and no place to put them on. At the moment I still have 7 alchemists that can be replaced.
Basically, no reason to hold anymore. I'd say slowly push yourself up in age while levelling your next post Arc GBs. With lvl 80 Arc and an active arc group, you won't miss the quest FP from productions
After Arc, I'd recommend picking the next GB to raise and just pushing it up to ~60 before moving to the next one. No need to go wide and make a bunch of lvl 3-lvl 10 GBs
If you want to keep doubledipping, you'll be leveling at least 2-3 GBs at a time, the FP production of a 80 arc is too high for just one.