  Vortex dynamics in a multiband anisotropic superconducting such as the Fe
based superconductors, is interesting and potentially important for
applications. In this study we examine flux-creep data for fields along the
second magnetization peak observed in M(H) curves of
BaFe$_{1.9}$Ni$_{0.1}$As$_2$ for H//c-axis, H//ab$-planes and H forming a
45$^o$ angle with ab-planes. We find that the M-H loops taken from the
different field directions can be collapsed onto a single universal curve at
all temperatures with a simple scaling factor equivalent to the superconducting
anisotropy, showing not only that the vortex pinning is isotropic, three
dimensional and most likely related to point like defects. The resulting
critical currents however, taken from the Bean model appears to show enhanced
low field pinning for H//c. The features in the vortex- dynamics also differ in
different field orientations and show no direct correlation with the second
magnetization peak Hp as is the case with a direct crossover in pinning
regimes. Isofield plots of the scaled activation energy obtained from
flux-creep data is found to be a smooth function of temperature as the Hp(T)
line is crossed consistent with a single type of pinning regime operating at
this field, independent of field orientation. The functional form of the Hp(T)
lines in the resulting phase diagrams also support this view.
