Don't ask people how you should spilt up your training. You should practice both standing and ground, but focus more on the one that you find more enjoyable. The one you like more is the one you will be able to advanced further in. If you prefer grappling study striking so you can grapple. If you prefer striking study grappling so you can strike. You should pick the one you like more, and study the other one so that you can make sure you are doing what your best at in a fight. Hopefully that makes sense. I'm really tired right now.
There is no right way to spilt up your training. Just focus on the one you like more.