Thinking about the 967 combo, I took a quick look at the data since the lottery started drawing two-a-day and made a list. It looks like there was only one other year, 2007, where we only got one combo of 967. There have been four years, 1997, 2003, and 2006, 2011, where we only got two instances of the 967 combo.
On the other hand, the big year for the 967 combo was 2014 where I count ten instances. That year, you could have made (a little) money by playing a full $6 combo on 967 every draw!
There may be other hidden gems in this chart, I haven't looked at it in detail. One thing you might want to look at is whether that combo likes to fall on a particular date, like Valentine's Day for example.
Good Luck!!!
03/08/1995,967,798
03/13/1995,624,967
08/31/1995,967,333
10/04/1995,976,930
03/29/1996,686,976
04/17/1996,070,679
04/25/1996,976,178
05/29/1996,769,663
05/30/1996,628,679
12/17/1996,967,418
09/05/1997,796,257
12/15/1997,697,243
02/14/1998,769,777
02/18/1998,769,823
04/22/1998,909,769
04/24/1998,769,519
05/02/1998,976,797
09/15/1998,796,459
12/29/1998,769,577
01/20/1999,967,458
04/28/1999,697,837
05/04/1999,976,051
11/18/1999,967,957
01/17/2000,283,769
01/22/2000,370,967
02/14/2000,385,769
05/22/2000,697,347
01/31/2001,124,679
06/21/2001,847,967
07/05/2001,928,679
07/28/2001,796,704
08/04/2001,697,252
09/04/2001,697,269
09/14/2001,076,769
10/22/2001,769,755 8 times in 2001
06/13/2002,692,796
07/02/2002,607,679
12/07/2002,976,322
09/08/2003,796,216
12/05/2003,561,769
03/24/2004,214,976
04/23/2004,928,697
07/26/2004,418,769
11/05/2004,796,996
11/11/2004,878,679
02/19/2005,769,743
03/23/2005,679,598
04/14/2005,679,600
05/13/2005,796,230
09/13/2005,976,178
10/01/2005,580,679
08/25/2006,712,976
09/16/2006,679,644
03/24/2007,429,679 1 time in 2007
01/27/2008,599,679
02/28/2008,497,769
06/13/2008,835,967
12/19/2008,796,987
12/30/2008,679,067
01/24/2009,796,574
02/03/2009,697,012
09/01/2009,796,417
09/05/2009,263,976
10/05/2009,796,339
10/08/2009,679,487
11/13/2009,796,700
12/13/2009,796,188 8 times in 2009
01/05/2010,679,153
04/14/2010,976,874
04/23/2010,679,156
06/04/2010,952,697
05/17/2011,796,125
08/08/2011,893,967
02/14/2012,697,261
04/27/2012,769,974
08/10/2012,308,769
08/26/2012,769,811
09/29/2012,513,796
10/02/2012,351,967
11/02/2012,976,841
11/11/2012,122,796
11/22/2012,309,769 9 times in 2009
02/08/2013,967,872
02/22/2013,890,679
06/05/2013,491,769
09/01/2013,697,633
09/16/2013,162,967
11/29/2013,679,276
12/17/2013,796,741
02/08/2014,797,976
05/17/2014,697,447
07/13/2014,679,275
07/26/2014,212,796
08/15/2014,192,679
08/25/2014,769,382
10/21/2014,697,972
11/04/2014,796,396
11/27/2014,697,691
12/04/2014,967,571 10 times in 2014
04/14/2015,796,499
06/25/2015,967,419
11/21/2015,796,812
03/11/2016,976,190
06/29/2016,961,967
12/21/2016,976,426
04/12/2017,568,679
06/18/2017,061,976
06/22/2017,769,947
08/25/2017,150,679
12/13/2017,769,910
03/22/2018,967,015
05/25/2018,679,534
07/21/2018,963,796
09/13/2018,083,967
12/03/2018,976,889
12/09/2018,716,679
01/13/2019,665,976 1 time in 2019