The dip and main are linked, if your main is point at the trees your dip is also way to high.
I use a halogen in my dip because it gives a good cut off and means I can wind it up as high as I can get away with - if you have hid or led in your dip you'll have it lower so you get a bright pool of light right in front of you, and we all know we should be looking further ahead than that.
With my halogen, in the wound up higher dip, I have a further reaching and softer pool of light and with and LED in the main it punches further, because it’s pointing higher, and the bright spot is further away, where your eyes need to be.
If you over light the foreground on a hexhead the main will never compete or be of use
The other advantage of this set up is, the main is not often on for long periods so less cooling issues