Option 1: The wobble extension
Pros: Easy to use, socket is easy to put on point, super cheap.
Cons: Adds length, not much articulation.
Option 2: U-joint extension.
Pros: Also pretty cheap. Massive articulation.
Cons: Flops around a lot, harder to control, still adds length.
Option 3: U-joint sockets:
Pros: Less added length
Cons: Costs more than just an extension since you need to buy a set.
Option 4: Ball and socket sockets.
Pros: Far smoother than U-joints, easier to get on the head.
Cons: The cost difference is quite significant.
I have all four, I use A and D frequently and avoid B and C. Though I used B before I got D more than I used C. Estimated cost: A: $3, B: $5, C: $20, D: $45.