coupling among messengers (neutrinos), Higgs and lepton doublets. As a result, Higgs and lepton doublet soft scalar masses get extra contribution from Yukawa mediation. The same $A/m^2$ problem applies here and neutrino Dirac Yukawa coupling can not be taken to be a large value for successful electroweak symmetry breaking in principle. On the other hand, too large $m_{H_u}^2$ and too large A term may drive stop tachyonic through renormalization group running with top Yukawa. The problem becomes worse as the stop soft scalar mass squared at the messenger scale gets a negative contribution from Yukawa mediation. The situation is shown in Fig. \[fig:phase\]. For the running mass of the top quark 160 GeV (the central value), the tachyonic stop appears before the real $A/m^2$ problem prevents the successful electroweak symmetry breaking as we increase $y_\nu$. The crucial difference compared to the previous work in which $A/m^2$ problem is emphasized [@Kang:2012ra; @Craig:2012xp] comes from the number of messengers. In neutrino assisted gauge mediation, the number of messengers is three, $N=3$. The $y^2$ contribution is effectively replaced by $N y_\nu^2$. Large $N$ effectively reduces the $A/m^2$ problem by $1/N$. At the same time smaller $y_\nu$ can provide the same impact with the 