  Temperature dependent high pressure electrical resistivity studies has been
carried out on Ba(Fe_{1-x}Ru_{x})_{2}As_{2} single crystals with x = 0.12, 0.26
and 0.35, which correspond to under doped, optimally doped and over doped
composition regimes respectively. The evolution of structural/magnetic
(T_{S-M}) and superconducting transition (T_(c)) temperatures, with pressure
for various compositions have been obtained. The normal state resistivity has
been analyzed in terms of a model that incorporates both spin fluctuations and
the opening of the gap in the spin density wave (SDW)phase. It is shown that Tc
scales with the strength of the spin fluctuation, B, and T_{S-M} scales with
the SDW gap parameter, \Delta. This provides a prescription for the unification
of the composition and pressure induced superconductivity in BaFe2As2.
