Complex sentence: Tamerlane richly endowed the feudal apex of Laks (emirs, nobles, grandees), which led to shamkhal of Kazi-Kumukh strengthening his influence in the region.
Split into simpler sentences: Tamerlane richly endowed the feudal apex of Laks (emirs, nobles, grandees). In this connection shamkhal of Kazi-Kumukh strengthened his influence in the region.