Stun Threshold

Guys whats a good stun threshold? I realized my survivability had been mainly hampered by being easily stunned, so i speced some ernergy shield -> threshold nodes but now i realize i have 70% of energy shield as stun threshold and about 5 times as much energy shield as life. So more or less 66% of my ehp is "stun threshold". Probably can free up some nodes. Whats a good number for stun threshold? What you guys usually going for?

Also I assume everytime i get interrupted its a stun. Or is stun a seperate state from being interrupted?