Once I automated a script that went through every combo listed on some "Magic the gathering" website and built graphs to try and find out what would be the most combo-filled possible deck.
I could also consider only the cards I own to build the graphs.
The names are in french.
I don't want to explain the details, in short : nice try, but it's not that simple.
Some cards that regularly made it to the top of the list were :
Intruder Alarm
Phyrexian Altar
Ashnod's Altar
Enduring Renewal
Perilous Myr
Here are various files related to the project:

list of combos