Well, statistically at least, you should just build a ton and the luck factor will be greatly diminished.
Actually.. as a mathematician, I'm thinking that what they did has some merit.. In Civ 5 it was always the case that if you could protect your op units trough upgrades and promotions for some time then you could destroy your neighbors with just a handful of super-strong soldiers.. Now.. if you build a lot of Kris swordsmen.. you have to build a bit more than usual to get at least 6-8 good ones.. but those good ones are significantly stronger than a normal OP unit. So.. actually.. they can be used for hilariously brutal 'Chuck Norris' units. I've had 6th level Jaguar-turned-longswordsmen take out cities by themselves and here you have something that is much much scarier. So .. you have to build a bit more of them to discard the useless ones.. But once you get to the magic number if you take great pains to avoid losing them, while leveling them up some it can steamroll easily. Easier done vs the AI of course.
Think as a mathematician. The possibility is really really fascinating here. Initially small buffs can turn out to be really strong the way the game is balanced (it is generally well balanced) and those are not small buffs at all!
Actually.. as a mathematician, I'm thinking that what they did has some merit.. In Civ 5 it was always the case that if you could protect your op units trough upgrades and promotions for some time then you could destroy your neighbors with just a handful of super-strong soldiers.. Now.. if you build a lot of Kris swordsmen.. you have to build a bit more than usual to get at least 6-8 good ones.. but those good ones are significantly stronger than a normal OP unit. So.. actually.. they can be used for hilariously brutal 'Chuck Norris' units. I've had 6th level Jaguar-turned-longswordsmen take out cities by themselves and here you have something that is much much scarier. So .. you have to build a bit more of them to discard the useless ones.. But once you get to the magic number if you take great pains to avoid losing them, while leveling them up some it can steamroll easily. Easier done vs the AI of course.
Think as a mathematician. The possibility is really really fascinating here. Initially small buffs can turn out to be really strong the way the game is balanced (it is generally well balanced) and those are not small buffs at all!