This is a TH6, just before they made Masters (check their profile for their highest cup level - just over 2600 IIRC). I stalked this TH6 for about 3 days trying to get revenge, and missed them, not surprising as they would have got 3-starred within moments of logging off. I saw it took them more than a day to get from 2535 to 2595, then they lost not just one but two fights in a row; by the next morning they had finally made masters then dropped right back down to Gold 3.
For a TH5, it would be pretty much the same kind of deal... snipe TH, over a long period. The TH6 above used 100% archers, with Giants in the Clan Castle (for when tessla pop up, lol), and heal spells.