I think that your mana won't really work.
manalith is not a great card,
evolving wilds will slow you down and there is a chance that you won't have the
opportunity to cast your green cards. you should use some bicolor lands and whipe out the
manalith and maybe
evolving wilds as well.
also, your only good reason to be using red here is becouse of
soul-scar mage ability. so I would use more soul-scare mage and change
puncturing blow (4 mana seems a lot) for more
dual shot and lightningh strike (specially
dual shot, that would make 2 -1/-1 counters).
maybe something that makes your tokens stronger could work well too. and you could use something with flying or reach... maybe
Obelisk Spider ? however you maight be able to pass without it since you can destroy the flying stuff with counters or
lethal sting.