There are a few options. On pure physical sets you will probably use Jolly to tie with others of the same base speed, however on bulkier physical sets Adamant is an option too. On mixed sets Naive is a good choice, however Thunder is not a good option. Kyogre is pretty much the only situation where Thunder is used, and Lightning Strike hits it harder anyways.
Zekrom @ Life Orb
216 Atk / 40 SpA /252 Spd
Naive
-Draco Meteor
-Bolt Strike
-Outrage
-Volt Switch
It's movepool sucks, but this is a useful Kyogre check and a great way to maintain momentum on offensive teams.