Gallade should run Swords Dance / Close Combat / Knock Off / Zen Headbutt in most scenarios, although I'm not sure how many opportunities it will get to setup in a 3v3.
This generally isn't the best place to ask as OU is completely different from Battle Spot; remember they don't ban broken shit like Blaziken and Mega Salamence so you really have to prepare for them. Not to mention this is restricted to Hoenn Dex-Only without the event legends or weather trio. So a lot of sets really won't be as effective as they might seem to be in OU.
Honestly, for in-game I doubt you're going to get any better than that without Powersave or whatever. I'd say just roll with it as the 16-19 extra points prolly ain't gonna be that important.
Trick room kinda messes up the equation, but you may be okay. The best way to answer your question would be to check this forum: http://www.smogon.com/forums/threads/oras-ou-speed-tiers.3527024/. It lists Pokemon by their speed tiers, so you can scroll down to where they post minimum speed Heatran to determine what would outspeed it under Trick Room. At level 100, you should have 160 speed (assuming 19 speed IVs). At a quick glance, you'll probably be okay since a lot of things in that speed tier aren't usually offensive sets, but the call on whether to toss or keep it is up to you.
name: Fast Support
Modest is normally 252 SpA with either 216 Speed to outrun neutral nature speed Kyurem-B or 240 to outpace Pinsir and Heracross, the latter before a mega evolution. With that said I usually run a 40 HP / 252 SpA / 216 Spe spread when I need to run Modest nature Manaphy.
This was mainly due to the major buff knock off was given. It went from 20 to 65 power, and deals double damage when it knocked of an item.
I honestly thought about this for Reshiram and Kyurem-W. THen I tried using the Honkalculate feature at gamut-was-taken.github.io, and found that the only thing that walled a LO set of Blue Flare, Draco Meteor, Focus Blast, and Stone Edge were the Blobs and AV Azumarill (which could be hit on the switch with a Wisp, neutering it for the rest of the match). Then I tried KyuW (swapping Blue Flare for Fusion Flare and Stone Edge for Ice Beam), and the only things again were AV Azumarill and Chansey (Blissey had a decent chance to be 2hko'd after rocks).
Mega Sableye checks are honestly not that hard to come by tbh; literally just a Fairy which are easy to put on a ton of teams (Gardevoir, Sylveon, Clefable...)
I can see it being suspected along with mega metagross in the future, but I think people overestimate it tbh. That's just my opinion though, but from what i've seen people treat it like a chicken when it's only a feather... Or maybe like a wing in this case since it is still very good, just not as OP as I keep hearing.
It was used on a team that peaked #1
