klaas wrote: ↑I prefer people building armies with multiple unit types, instead of just a single discounted type.
I totally agree with this.
Actually in Rise of Nations, every unit you build increases cost of next unit of same type. So in our case Rifleman cost would be like 100, 102, 104, 106, 108... I'm leaning towards this type of system if I had to choose between to bulk price reduction and it's opposite.
Build price reduction is a trap because single / double unit armies are easy to counter. But then again, this is not really the case in our game because of different production queues. Imagine someone spamming nothing but mobile flak and tesla troopers for OP bulk savings.
noobmapmaker wrote: ↑The catch: you'll have to pay in advance and you can't cancel your order

This is a second trap. Occasionally you get crazy value out of your bulk savings and other times you get get outplayed and can't switch production to only unit that would help counter enemy push.
tl;dr: Unique and cool idea but in my opinion it creates more problems than it offers.