If you could get support from a professional in any area (marketing/design etc) what would it be?

Chatting to a couple of people about this, lots of founders and indie hackers tend to wear multiple hats at once. I think it would be nice though to have someone with experience like a mentor etc to fall back on when I need advice in specific areas.

For me it's definitely marketing/sales and potentially UI/Design that some more experienced help would be good, what about you guys?

Some other ideas are like product development, business development, product management, legal etc.