12433/34 Chennai Rajdhani. Have spotted it with GZB WAP1 ( Loco now with AJJ), LGD WAP4, GZB WAP5, LGD WAP7 and LGD WAP7i. Haven't seen it with WAP4E class specifically, but WAP4E is not a separate class of locos, so I guess MAS Raj has also see action with all currently operating WAP series.