Hi! There are several other topics discussing your issue, for example: https://forums.totalwar.org/vb/showthread.php?t=74051 But not to be a jerk I will answer you: if you manage to kill the panzerphants of the Timurids, they are not more difficult to eliminate in open field, than any other faction. As you are with the English you ain't have no javelins, that would be the best against the pachydremes, you have to use ballistas and archers with fire against them.