Column Speaker build

Hi, I'm new here and planning to build an acrylic column with sub. More to look nice, but also should sound good.
4x PLS-75F25AL02-08-ND 3.5" woofers (120Hz-800Hz)
4x SLS-85S25CP04-04-ND 3" full range (200Hz-5kHz)
2x XT25SC90-04 tweeters for the small size (>5kHz)
12" sub (<120Hz)

1. Do I need just 2 tweeters or 4 in this case, as the tweeters are rated 100W?
2. Do I put the tweeters in the middle or on top, as this will be mounted close to the ceiling?
3. For the 3" full range, should I just go full range 200Hz-20kHz or will there be breakup >10kHz to take note of?
4. Should I xover the tweeters at 3kHz instead of 5kHz?
Also, I'm thinking to use active xovers like ADAU1452 so I could tweak the freq as I go along. Will need 4 amps incl sub.