I’ve just got the Blade Pro, runs perfectly when working in UE4 and if need be I can hook it up to the CoreV2 with my 1080 if I want some more power. It’s still portable just need to make sure you have the power brick with you at all times because you won’t get more than at most 2 hours use.
Just spend around $1000](https://mylaptopguide.com/best-gaming-laptop-under-1000/) to $1500](https://mylaptopguide.com/best-gaming-laptops-under-1500/) and you can get the best gaming laptop for UE4. Look for minimum 8GB RAM, dedicated graphics, latest gen. processor Core i7 or i9 will work and a good display with higher refresh rate. I’m missing one point i.e. storage. Look for SSD storage with minimum 512GB.
Pretty decent configurations for a gaming laptop under $1500. But you can get much better specifications in 2021, at least 10th gen Intel i7 processor combined with RTX 2070 GPU.