Agony Arch 

Is it possible to access the anchor from above to set up a toprope on this climb?

Not really... there are 3 bolts above the vertical section of the crack that you might be able to set something up to work that part & maybe some of the arch.

This route is very easy to set up for top rope, bolted and safe to do laps on, just don't fall near the start.

Ground up is the way to go

if youre going TR it place some directionals

There is a lot of bird shit at the base. Like a Chuckie Cheese ball pit of bird shit. Also lots of it in the crack that will prob fall out on to you and possibly smear on your hands as you fist the last section of the climb.

Bring hand sanitizer

Could also be called Aviary Anal Arch. So much bird crap everywhere. It was pretty gross... Had to crimp down on a mound of it up in the upper off width section. The lower/vertical section is amazing and definitely 4 stars. I took (and placed gear) in the following order: red alien, 0.75 C4, grey alien, #1 C4, #2 C4, 3.5 camalot, #4 C4, #3 C4, #2 C4, draws for the anchor. The first go on this route I only took one #2 and was really wanting the second #2. It really makes a difference! The 3.5 camalot fit perfectly in the first wide section. Much more solid than either the #3 or #4 C4. This arch is amazing and would be super classic in another more traveled trad area. The bird crap is a huge downer. I would not recommend climbing this in warmer temperatures when the bird crap starts to get mushy. There are probably 150 birds living in this crack.