acid rain chaac

pros/
versatility
power
sustain
team player
wrecking ball
wonderful clear
cons/
simply put chaacs axe ability doesn't move very fast so escaping can be tricky until a little later in the match
his abilities don't do insane damage but they do tempt you to rush too early resulting in death more often than not
mana hungy early on

Boots

warrior tabi is by far my favorite pick for this item because of the obvious power which will help wave clear early on as well as more powerful pokes

The mana problem

transcendence fits the bill here giving you a lot of power and mana/mp5 simply put its a mandatory item that will make your life much much easier and it only gets better with the match

CDR

jotuns wrath is fantasic here as it gives you penetration good power as well as cdr with this online its time you start getting more aggressive as you can insta-clear waves of minions or jungle camps

Utility

shield of regrowth I believe is the best choice here as it gives chaac a bit of protection as well as cdr but most importantly when you use your rain(3) to heal you or slow your enemy it gives you 35% speed increase

Kill secure

heart seeker is an incredible pick because the power and attack speed increase coupled with your added movement speed also its stacks go perfectly with chaacs passive which when you get 5 basic attacks your next ability is free and gives added power on top of the 5 stacks from this item which increase your next ability cast by 40 power

Iceing on top of the cake

shifter shield if you need the extra boost for tower killing
mystic mail if you find yourself boxing a lot
void shield if you need that little extra umph to break through someones protections

guide not 100% finished due to my real life stuff getting in the way (my gf)