obliviwisp is a personal choice . it's useful against dracossack I suppose, though prophecy are looking like the better deck of this format. it could still prove useful with prophecy builds starting to run fewer priestesses, and a brick wall that neither kycoo or jowgen can get over without star hall is good coupled with negation. I'd suggest taking out monks, 2-3 thunderbird, and hraelsvehagek for another rabbit, a playset of sabersauruses, and a lantern and/or azzeroth based on preference. all the single copy traps kinda hurt consistency and can't really contribute to the deck with one copy each. I'd take out terminus and bribe, and work around to include a second fiendish (though breakthrough skill just got reprinted, and is about $10-$13 now, so if that's in your budget, you should pick someof those up instead) and bth/eev to improve the chances of drawing them.
I'll be adding 3 sabersaurus, I'm getting rid of my monks, too. I decided that I won't be adding any of the lesser Evilswarms that don't help with the general deck; Effectively everything other than Castor, Thunderbird, Mandragora, and Heliotrope. I'll take the advice regarding the individual traps, and I'll start doubling up on them when I get them. I don't really want to take out thunderbirds yet, I'll keep two for sure, the one I take out will be for space with things like Tour Guides, Effect Veilers, etc.