so the plan is to generate tokens with infect and
overwhelm the board? what is the budget of this deck?
i would remove cards like
scute swarm and white suns zenith for more tutors and such so you can get your infect on the board faster and start pressure earlier
would suggest running one of each fetch if possible, as well id run some red mana sources for kenriths ability. being able to give your tokens haste/trample is huge with going a wide aggro board. some of the counterspells could also be swapped for better ones.
Mana Base:
instead of running a lot of mana dorks, id swap some out for more ramp. Kodamas reach, cultivae,
three wishes. as well more mana rocks,
mana crypt, and some signets that relate to the larger colour scheme for the deck would help if you find yourself with not enough resources.
tutors:
you have very few of these, if its a cost issue that fine but id think about gettin eladamiris call,
worldly tutor, cards like
shared summons,
chord of calling,
tooth and nail would help as well
could also run stuff like
entomb and
buried alive to get pieces into the grave then use kenriths ability to
reanimate them
General Cards:
Path to exile - would just run sword to plowshare and a different removal, health is not a concern for this deck and you dont want to be helping others with a free land.
Walking balista - not sure what hes in here for, unless you run with heliod or mikaleus the unhallowed id replace it with somthing in theme with the deck
noticed that you dont have much for keeping your board alive in the instance of a board wipe, heroics intervention is good, would think of slotting in teferis protection,
boros charm,
eldrazi monument for somthing that sticks to the board.
this is a quick run over of some things i saw, but over all looks like a fun build!