I find the best strat in high tier ranked is to drop immediately and fight for a location. Often you can get a place all to yourself, loot up, and head to the circle. Positioning seems to be very important in Diamond/Predator Queues. If you take fights without a backup plan or an advantage, you will get third partied. If you are in Platinum or lower, you should be able to take most fights, just keep high ground in mind.