Turnip2k
Harvester
Ok, so if the base techs cost alot of money, and your ally is having a quiet time (not much incoming, no imminent war etc...) you can probably afford to do them then. Then, when your ally is having a tough time, you will have all the base developments done, leaving the cheaper unit developments to do. This will mean you wont have to save up as much money in one lump sum to get the better units - being a preferable position just before wartime (although you wont be able to stockpile the units, so will have to plan this into pre war strategy).
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