I didn't want to start playing SS Battle Frontier until I finished Platinum but since I needed BP for the move tutors I kinda got addicted to it all over again. On my team I have Gyarados, Latios and Umbreon, one of my first run throughs on Battle Tower got me to 45 which is even better than I was doing in Platinum with Garchomp, Latias and Registeel (I picked that team before I even seen the records here O_O)
In my opinion you really should take breaks before starting a new streak. My team has a huge weakness to Bug if Gyarados gets taken down and this includes Absol and Crawdaunt with X Scissor because I don't have a lot to hit them back. With the latter's Quick Claw hax I get pissed off, start my streak again and before I know it I'm just thrashing the A button to try and get my streak back which means I'm going to make another stupid mistake.
SS's Battle Factory is so much harder than Platinum's, my record in that is 40something, whereas in SS I can barely get up to Thorton never mind beat him. I've only got a Gold in Battle Hall with my Focus Sash Garchomp I named Lady Gaga :3 but it's in Platinum and I don't have 2 ds to trade it over :(
I wanna get an insane 1000+ streak but I don't wanna steal a team to do it =/