Great idea with the standstill (can’t believe I didn’t think of that considering how much I like that card) should I increase the vial count from 3 to 4 to ensure having 1 in my opening hand? 
Try 4 at first, if it doesn't work for you, cut one.
Also not sure what you mean when you ask do I see fetchlands a lot. I generally find one of mine within the first 3 turns. If you are asking does the meta contain a lot of fetchlands  I would have to say yes. Most of the decks where I play don’t run many basics (some run none at all).
I asked about fetchlands in regards to your Wasteland count.  Since you say that many decks do not run basics then 4 Wastelands is great.  Fetchlands do slow your Wastes down a bit though.
Good advice on sacred ground other side board. Other cards I’m considering are a mix of kataki and energy flux (some of each to get around chalice and removal), And tinker / colossus. There is a wide gap between the developed decks and a good number of  T2 and extended decks with moxes thrown in. tinker colossus just seems the best way to handle those for only two side board slots (possible more if I add a tutor or two to make sure I get the tinker)
I can't really recommend Tinker ->Colossus without Brainstorms.  Brainstorm in Fish is a matter of preference.  It is not really card draw, only manipulation.  I think Tops are ok... just not optimal.
*Usually* E. Flux means game against Stax.  Kataki is more of a nuissance.  Try Serenity?