First of all, keep in mind that all Un-set questions are always up to interpretation, and may be played different by different playgroups
With a little deck manipulation, you can easily get a good number of cards off the top of your deck with minimal life lost
Osteomancer Adept allows you to cast creature spells from your graveyard but adds foraging as an additional cost
If you go straight red, youre missing out on blue counterspells, greens great creatures, blacks unconditional removal, and so on
The future looked bright for the format at one point, but Star City Games cut their support for Legacy on their Open circuit in 2015 and there are fewer and fewer Legacy GPs as the years pass
A complete overview of all upcoming Magic: The Gathering set releases and card spoilers