For awhile now, I've been running a Sceptile-Manectric deck which has proven to be very solid; and most likely, I also will run this deck at the Midwest Regional tournament. Let's hope Sceptile EX will be the "right play" for our respective tournaments.
After carefully reviewing your deck list, I offer the following thoughts/comments for your consideration. IMO:
Lugia EX does not seem to fit "well" in this deck since F decks are not a major concern for Sceptile EX, nor can you power it up easily in 1 turn with your current list (No DCEs included)
I suspect many players will run Virbank City Gym in order to again take advantage of Virbank City Gym. So, I believe you can reduce your VCG Stadium count by 1 and fill that card slot with another Stadium, like Parallel City (I found this Stadium to be very helpful in some matchups and game situations)
Although Acro Bike helps you "thin-out" your deck, I have not found it to be more critical than another key Tool, Supporter (AZ) or a 4th VS Seeker.
Given the relatively low Retreat cost of your Pokémon, I think 2 Switch seem "excessive."
Given the above comments/thoughts, I'd suggest the following deck changes:
-1 Lugia EX
-1 Virbank City Gym
-2 Acro Bike
-1 Switch
+1 Bunnelby (PRC 121) - there are a variety of mill decks that, I believe, will be popular at Regionals; so, this Pokémon is a great counter, as well as being a good starter and retriever of your discarded resources
+1 AZ - allows you to recover and reuse your Pokémon (e.g., Shaymin EX)
+2 Level Ball - helps to get your Spinarak and/or Jirachi EX our faster without discarding cards
+1 Parallel City
I hope you find these comments helpful and good luck at your upcoming Regional.
