In this week’s edition of the PHT Power Rankings we take a look at 10 players, coaches, and general managers who are going to have a significant impact on the playoff race in the second half of the 2018-19 NHL season. The playoff race in the Western Conference is a jumbled mess where pretty much every team outside of the Los Angeles Kings and Chicago Blackhawks still has reason to believe they can make the playoffs, while the Eastern Conference is, with one or two exceptions, down to deciding seeding and division leaders. Goalies, as they usually do, will play the biggest role in what happens for several teams, but do not forget the general managers that have some huge decisions to make when it comes to their rosters. Basically what we are looking for this week is which individual people will be the most impactful on the second half playoff race, whether it be due to their play on the ice or the decisions they have to make. To the rankings! 1. Jarmo Kekalainen, Columbus Blue Jackets — This has to be the most fascinating and maddening position of anyone in the NHL right now. On one hand, Kekalainen has a really good team in a wide open division that…