This is my goal in life right now.
I am 1540 solo que atm, I have gold in all 3 ques, and have captained 4 teams to gold in 3's but have yet to get plat. My last team started 7-0 and almost got their, but fell short. I like to start fresh with teams at this point for the high elo gains... one good run to 1650 gets it. I play a lot, and am willing to dedicate all of my LoL time to 3's plat until Oct 23rd. My best role is jungle, and my best champ is mundo. I play other champs (like olaf jungle) and am willing to lane if you have a jungler. My strategy... get the dragons-- in over 100 3's games played I have only ever lost 1 game when we had the dragon advantage in the match.
Edit: your profile shows that you got plat in 3's a while back... why are you still trying? just curious.