Аннотация:Excited states in low-energy spectra of $ ^{70-76} $Ni are considered. Accordingly, pairing forces in the form of surface delta interaction are employed to account for the formation of the ground state multiplet with seniority $ \nu = 2 $ states. The multiplet splitting is described with mass relationships of masses of neighboring nuclei. Subsequently, the seniority model is adopted to reproduce or predict the states $ \nu = 3 $ in odd-even isotopes and $ \nu = 4 $ in even-even isotopes. The correct account of the $ 2_1^+ $ state should allow for the description of the reversed order of $ J = 4 $ states with $ \nu = 2 $ and $ \nu = 4 $ observed in experiments. The results obtained are compared with the structure of similar multiplets in $ N=50 $ isotones.