Irish kerns can do good work for England, if you cannot hire mercenaries - javeliners from Iberia or South Italy. Put them on skirmish and attack elephants, they usually are in vanguard of Timurid army. 2 kern units must kill 1 ele unit in 20-30 sec with good morale support ( rally ability or standing behind some elite units ) almost without loses. Also, i beleve retinue + yomen longbowmens can also do this job, cause Timurids arent so mobile as Mongols and move slowly with their haldberd militia. Just let them shot their normal ammo, they will kill eles much faster then with fire ammo.