Cast Bloodrage if you have less then 10 rage, else demo shout

/script if UnitMana("Player")>=10 then CastSpellByName("Demoralizing Shout"); else CastSpellByName("Bloodrage"); end;

Demoralizing Shout + show target attack power

shows you target attack power after reduction. change 146 depending on shout rank.

/cast Demoralizing Shout
/run a=UnitAttackPower("target") - 146 if a ~= lastAttackPower then DEFAULT_CHAT_FRAME:AddMessage(a) lastAttackPower = a end