I shoot low light with Nikon D3300 and Yongnuo YN-460 speed light. Most of my pictures are out of focus.
I'm on a budget. What is the lowest-priced speed light for Nikon that has an AF assist beam?
I'd say the Neewer VK-750II for Nikon, $50 at Amazon. It does TTL and manual flash, and slave flash remotely.
A review including focus assist at http://www.scantips.com/lights/vk750.html