Might consider the
Mogg War Marshal instead of the Goblin Investigator. Both are 1R, 1/1 and drop a 1/1 but the MWM also drops a 1/1 when it dies although it has echo if you want it to stick around. Long term the MWM still leaves two 1/1 but gives you a body to do something with for a round before it dies if you don't want to pay echo.