3.0.0.4.386_41700 <-- Most stable version for me so far

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I've tried so many Asus official releases for years starting with RT-AC68U, then added RT-AC88U as main router, which was later replaced with TUF-AX3000, and itself was converted to a node. I had been upgrading the firmware for all 3 devices one after another until now. Both TUF-AX3000 (AiMesh Router) and RT-AC88U (AiMesh Node connected via WiFi 5G to router) are running on 3.0.0.4.386_41700, while RT-AC68U(AiMesh node connected via cable to router) on 3.0.0.4.386_41634, as it's the latest version for it. I have total around 15-20+ devices connected. If you're looking for a stable version, try 41700, at least, it's the best one till now for me.