off hand, my only critique is that all your creatures are relatively high cost. I would put in some 1 mana cost creatures.
some lowly goblins maybe, like rage goblins, or frenzied goblins, there's also a bird from white whose name i cant remember that's 1 mana cost 1/1 flying. Simple but to the point. also, some
figure of destinys would probably be nice.
also, instead of the trigon of mending, an
essence bottle is slightly more mana effecient (saves 1 total mana per counter, and is mana free to use all counters at once). I've used this thing in conjunction with many a white deck to really buff my HP.
i'm not entirely sure what you mean by "keeping your deck standard" (keep in mind i haven't played MTG too much in the past almost 15 years now, though i do check up on new card sets on occasion), do you mean tournament legal? If that's the case, i have no idea what is legal and what isn't these days. So i dunno if these cards fit in with a "standard" deck, but those are my off-hand recommendations.