Someone in my kd just asked me if there was an up to date age 73 ambush calculator and I said don't think so, the the question is, why not have an in-game one which would make life so much easier, or is it that you just want to make it difficult for people who aren't mathematically inclined?
If you look down your nose at someone else's intellectual ability then that's really quite appalling, not everyone is good at math, everyone has weaknesses and strengths and I don't see why this game should penalise those that may struggle with manual calculations of ambushes especially if you are trying to attack before the next tick.
You want more players, you want people to stick around then make the game more accessible and playable, if you are going to include ambush as an attack then give us an in-game calculator.
I suspect the real reason is that if you provide one no one will fail an ambush, thus making ambushes over-powerful? That argument might stick if munk didn't have an ambush calculator and I suspect lots of kds now have munk and it's been integrated as part of the game now, albeit still an external tool. But not everyone has munk, so those of us that don't are at a distinct disadvantage, unless that's the intention and you actually want us to subscribe to munk?