Take ESpeed earlier if need speed, sell order: RShot > ESpirit > RRounds > HPWard Skip these for the 3k Mid's below whenever you can as those have better return on investment.
Ivy is weak early game , farm souls for Tesla Bullets and take ASAP then you can put up a fight and farm T2 camps in between waves. Take in order Left to Right until you have all Early Game items and Tesla Rush, then if soul bank permits take higher cost items at your discretion.