Regarding my comment about taking out the prowess -- I meant that as in taking out the
monastery swiftspear in lieu of one of the two drop landfall creatures or something (since the deck seems to be more optimized toward landfall than it is toward prowess).
There's a 2-drop red creature with trample and landfall (+1, +1) that I see a lot of landfall decks on mtgtop8 using. This is just an idea though, since you have mina and denn, atarkas comm.,
swell of growth, and of course the sac lands which all allow you to get multiple landfall procs a turn.