I'm really not sure about your sideboard choices. As somebody else pointed out to me a few weeks ago, Ghostly Flicker in Tron makes Spreading Seas very impractical as an answer to Tron. Maybe something like Thermokarst if you want to have land destruction in your sideboard? Otherwise, something like Nihil Spellbomb (even without the card draw) or Tormod's Crypt can be far more crippling against most flavours of Tron than land destruction. I'd also consider running something other than Gut Shot against Elves. Maybe Echoing Truth. You'll probably want some number of copies of Gleeful Sabotage against Affinity and Astrolabe decks. This also gives you another option against Bogles. You might even want to run Serene Heart in stead of Reverent Silence.
There was a thread that had some great discussions and contributions to this archetype a few years ago. It can be found here! While it is dated it features almost all the cards you have and even includes cards that were, at the time, only legal online (thanks to the merging of online and paper you can use any of the cards discussed).
Overall, your deck could use more discard outlets than just Wild Mongrel. Mongrel is the best one there is, but it can't carry the deck alone. Aquamoeba is another option. It's not great, but it's probably the second best creature with an instant speed discard ability.
Deep Analysis is okay, but overall it can hurt Threshold and even help opposing Anglers in the race against you with the life loss. Careful Study might be worth testing in its place.
Circular Logic and/or Foil can give you some protection and fight against control decks, although Foil might require more Islands to be effective.
I also suggest a Moldervine Cloak or two to swap with some Rancors. Cloak can get you to Threshold fast and allows your most your creatures to trade or even swallow an Angler.