That makes a lot of sense. But maybe my strategy is not so bad for a stage1:
It is bad on every single combustion engine on any stage.
1: Did you forget about LDRXNZK? you can decrease specified load under knock
Not active in many files, and relying on this is silly because reducing boost does not immediately reduce EGT, it takes time. Try it sometime on a dyno with an EGT probe. Look what EGT does when you lift the throttle and cut fuel to injectors on overrun.
That is why EGT is always controlled with fuel.
2: With the tiny stock IC, you're forced to use a pretty rich lambda if you want some power... let's say in the .80 area, that's a pretty conservative lambda for EGT (I think)
No it's not. You can easily melt the engine with 0.8 and bad fuel. Especially if you have a stretch of autobahn to use.
You can tune
your car like you want. But telling others to disregard things that the OEM's have put in for a very good reason (there are multiple modules dealing with ignition angle efficiency) is not good.