Axe users in Genealogy of the Holy War are generally encumbered by the massive weight of axes. This essentially decreases their attack speeds as a result, and is reflected in the case of Tigris. It is thus recommended to exploit this weakness of his, and attack him with either Larcei or Ulster. As the both of them wield swords (which essentially beat axes), alongside their Awareness skill nullifying Tigris' Wrath skill, he should fall relatively quickly.
Tigris is one of the weakest Warlords in the Final Chapter. He possesses no skills, and his attack speed of 11 means that he is most likely unable to perform double attacks. The player should, however, stay vigilant to the 1~2 range of Tigris Master Axe.