Sand stars are usually not reef safe.
Shrimp are usually not considered cuc. You can have them, they just won't be tidying things up.
By 115 pound sof LR
and sand is that combined or of each? In a reef I recommend AT LEAST one pound per gallon of actual live rock but at least 1.5-2 pounds of rock per gallon total. The difference can come from dry rock (like Feller Stone's Antique Coral) which will become live rock eventually.
Lots of nassarius snails will be beneficial, both in the display and a few in the fuge. Start with 20-40 (not necessarily in one purchase). Add around 40 hermits (mix of burgundy, blue leg, scarlet, etc.). Also add around 40 snails (cerith, astrea, chestnut turbo, margarita, etc.). As problems develop you can add more of whatever will clean it. For example, if you get red slime algae you can add some burgundy hermits (after trying to increase flow since red slime is usually a low flow algae).
I wouldn't TRY to push off corals. Many are very hardy (more hardy than fish) and will make the tank much more enjoyable from the start. Mushrooms, zoanthids, etc. are tough as nails and hard to kill. Xenia is weed-like if it settles in but is stressed by change so acclimation is toughter, but once in and settled it is good to go.
Even if you don't add corals at around the same time as the first fish, keep all fish completely reef safe. The last thing you want to do is decide it is time for corals and have to tear the tank apart to get one or two fish out because they won't work. Don't do damsels except maybe azure.