Very nice team! I am working on something similar myself, teams like this are a lot of fun. Just be careful you don't lose too many Pokemon before time is up (especially if you are sacrificing Whimsicott with Memento). Slow teams take a long time to set up and can lose tiebreakers even if they would win eventually.
Bronzong's Block only works on one pokemon and after using the move. This means they can switch before you do so. VGC is a very fast and very offensive metagame so I don't think Bronzong would work as well as one would like for trapping. I would get rid of Bronzong for Gothitelle of Wobuffet.
Gothitelle's Shadow Tag works as soon as you send her in (ie. after Gothorita dies). That way you have an instant backup trap (eviolite Gothorita and Gothitelle are not too different defensively anyway). If you are not running Protect on Gothorita you might even be able to pull off a Leftovers Wobuffet (Encore!) after Memento (Cresselia has Rest anyway).
The Choice Scarf on Durant is possibly a little overkill given that Durant has 109 base Speed. If you run a different item it means you can run Protect on him against Fake Out leads. For example, you lead Durant+Dugtrio. You double Protect after seeing he lead his Fake Out user, then switch Durant for Terrakion while using Beat Up on Terrakion (and resist the Fire moves that hit Durant hard).
I would replace the Scarf, maybe with a Mental Herb. It is clear from team preview what your plan is and Taunt will ruin your day. Out of the Pokemon that outrun a normal Durant the 3 most popular ones (Thundurus, Tornadus and Whimsicott) have priority Taunt which will ruin your day and Choice Scarf can do absolutely nothing about it. Focus Sash might work too but you have that on Dugtrio already.
Your team is pretty cool though! Didn't mean to rain on your parade, just provide some (useful?) suggestions :)