Miss strangers? So do I, and here's my answer in the form of something that's viable in masters. It's a surprisingly flexible deck with no bad match ups due to the way strangers work. If you're a fan of high decision making decks this one's for you.
Save your reunite(+dark returns) until you're sure it's the right moment. This card is a huge swing tool that wins you games if you can predict which stranger is right for the match up. Merciless beats out midrange, bereaved for aggro, meditative for control, soaring in conjunction with grim strangers lets you deal lethal damage in 2-3 turns. More details about each stranger and why below.
Tireless stranger's effect is pretty weak as far as strangers go, yet I run 4 of him in order to play around permafrost(feln, skycrag, highway) and winter's grasp(nightfall maul deck). 3 for a 3/3 is also on-curve.
Reuniting for Merciless stranger, and dark returning when necessary compliments your removal spells, allowing you to stop varas, tavrods, caiphus, and all of time's big bads with only a 2 cost fixing stranger.
Once you've effectively stalled your opponent, get meditative and soaring strangers on board and start swinging away while tireless and bereaved keep you healthy and ready to block.
Bereaved stranger alone can often be enough to stop aggro decks thanks to the shared lifesteal.
Save feeding time for vara in decks that run dark return. She's the main target for your removal. If you can get her out of the match meditative stranger will carry you against control and midrange goodstuff decks.
Edit: Replaced some of the removal to better deal with SOTSK and relic based decks. Also shifted one fixer stranger from AP to feln for charging up ChaCu more reliably.
Edit2: Cut out some fixing strangers for 4x strategize, 2x wisdom providing much needed gas. Moved 4th feeding time to main deck, added polymorph to market to increase vara/caiphus removal consistancy.