Sideboard suggestions:Out-1 relic of progenitus-2 fiendslayer paladin-2 kataki, war's wage-1-2 slaughter games-1-2 boilIn+2 rest in pieceMay consider moving inquisition to main and boros charm to sideAlso a split between wrath and damnationMainboard:Take out some number of essence harvest and walkers (leave the 2 of solemn visitor)Move 1 or both of the spellskites to sideAdd in some mix of terminate, lightning boltYou probably also want some number of dismember between the main and side
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http://www.mtgvault.com/hummahumma/decks/izzet-standard-1drops/Here you go.
Please take a look at my Green 1 mana deck:http://www.mtgvault.com/hummahumma/decks/badgers-1s/
Have you considered Thassa, free scry every turn?
You could put in dingus egg for another win condition by damaging them every time you destroy a land.