I'm sorry, I know it's your deck and I'm not saying which card you shall include and which one you shall not.
I've just pointed out that my advice was indeed well informed, then it's you who makes the final choice.
If you're worried about your lands coming tapped, you could maybe consider
Amulet of Vigor (the combo with
Summer Bloom and the bouncelands was banned in Modern for a
reason, but since you don't play green...).
Anyway, the chances of you assembling all the three Tron lands aren't that high and you really should add some tutor, being
Expedition Map the best colorless option I can think of.
Moreover,
Ancient Tomb and
City of Traitors are other pretty good lands of choice in Legacy, though they're quite expensive (this too comes for a
reason...).
Another card that I've seen played is
Candelabra of Tawnos (there is also
Deserted Temple, though it's clearly weaker).
Also, for what I see you aren't going to do anything in your first three turns and stuff like
Chalice of the Void,
Trinisphere and
Tangle Wire will help a lot.
As for the sideboard, I would put at least a couple of
Crucible of Worlds against
Wasteland (alone or recurred with
Life from the Loam and such) and some removal against enchantments (namely
Blood Moon).
Ratchet Bomb could do the job but, as I see no card under cc4 (apart from
Endless One which sits in the sideboard anyway), I would suggest
Culling Scales which is a favourite of mine.
PS: Another card you can encounter in Legacy that basically
nullify your deck is
Ensnaring Bridge, so you need not only enchantment but also artifact removal (both
Ratchet Bomb and
Culling Scales will still do the job).