Definitely not #2. Remember that option 1 doesn't require you to sacrifice the champ. It just sits in your vault and makes the others better.
Personally I haven't built my second Rotos either, but he's on my building list, to counter a lot of the big single-hit nuker teams.
i appreciate your input, yea with the new fragment champ and lack of silver he wont be getting built for a long time for me