I have come up with several positions for my driftwood. Once I get hairgrass and dwarf hairgrass and sell some of my plants, I think that placement #1 will look best. Which one do you think looks best?
I vote for #4. For it leads the eye towards the left making the tall wood the main focal point.
The light doesn't look strong enough to get the plants to grow to their optimum. I think dosing with Tetra flora pride will help the plants to adapt to the light. Also if your gh and kh are low adding sodium bicarbonate, baking soda, will help.
#4 and #1 are the most interesting because they both assert themselves as pretty and define a space around them. #1 is the most complex as it stands right now but #4 is more creates a more powerful space as is. Try leaning the vertical stick in #4 at an angle and then growing up plants around that. Then you'll have a much stronger lower-space than in #1 and you'll have the upward motion layout #1 and #2 do so well.