I didn't realize that BOS still had other teams picks...
Horford holds no value for NOP, but yes, if he's just there to make salaries match then the picks really do trump anything we can offer.
I only mentioned the 2018 BRK and LAL picks. BOS could easily end up with two top 5 picks in 2018 (or top 3 picks in both 2018 and 2019) They own all of their own future first round picks. plus the following that they are owed from other teams:
2018 first round draft pick from Brooklyn
Brooklyn's 2018 1st round pick to Boston [Boston-Brooklyn, 7/12/2013]
2018 first round draft pick from L.A. Lakers
L.A. Lakers' 2018 1st round pick to Philadelphia (via Phoenix) or to Boston (via Phoenix to Philadelphia) protected for selections 1 and 6-30; if this pick falls on any of its protected selections and is therefore retained by Philadelphia, then Boston will instead receive the more favorable of Philadelphia's 2019 1st round pick protected for selection 1 and Sacramento's 2019 1st round pick protected for selection 1 (via Philadelphia) and Philadelphia will receive the less favorable or the protected of these two picks [L.A. Lakers-Phoenix, 7/11/2012; Milwaukee-Philadelphia-Phoenix, 2/19/2015; Philadelphia-Sacramento, 7/9/2015; Boston-Philadelphia, 6/19/2017]; the 2019 pick conveyance is included in "2019 first round draft pick from Philadelphia or Sacramento" on Boston Incoming
2019 first round draft pick from L.A. Clippers
L.A. Clippers' 1st round pick to Boston (via Memphis) protected for selections 1-14 in 2019 and 1-14 in 2020; if the L.A. Clippers have not conveyed a 1st round pick to Boston by 2020, then the L.A. Clippers will instead convey their 2022 2nd round pick to Boston [L.A. Clippers-Memphis, 2/18/2016; Boston-Memphis, 6/23/2016]
2019 first round draft pick from Memphis
Memphis' 1st round pick to Boston protected for selections 1-8 in 2019 and 1-6 in 2020 and unprotected in 2021 [Boston-Memphis-New Orleans, 1/12/2015]
2019 first round draft pick from Philadelphia or Sacramento
If Philadelphia conveys the L.A. Lakers' 2018 1st round pick to Boston, then Sacramento's 2019 1st round pick to Philadelphia; if Philadelphia does not convey the L.A. Lakers' 2018 1st round pick to Boston, then Boston will instead receive the more favorable of Philadelphia's 2019 1st round pick protected for selection 1 and Sacramento's 2019 1st round pick protected for selection 1 (via Philadelphia) and Philadelphia will receive the less favorable or the protected of these two picks [L.A. Lakers-Phoenix, 7/11/2012; Milwaukee-Philadelphia-Phoenix, 2/19/2015; Philadelphia-Sacramento, 7/9/2015; Boston-Philadelphia, 6/19/2017]; this pick conveyance is included in "2018 first round draft pick from L.A. Lakers" on Boston Incoming
If they are willing to start throwing around future picks, which I believe they would do for AD, we can't come close to matching what they can offer.
In case you don't feel like wading through all the protections and conditions, basically, BOS gets BRK's 2018 pick without protection, and also gets LAL's 2018 pick if it falls between 2 and 5. If it doesn't, then they get the better of PHI's or SAC's 2019 pick as long at it's not THE No. 1 pick.
BNM