Your projections are off a bit based on historical data. You project 620 targets but Allen only had 579 last year in a full 17 games. In his two most recent 16 game seasons in 2020 and 2022 he had an average that would have put him right around 600 for 17 games. His career high was 646 in 17 games played in 2021. I expect the Bills to have a continued focus on the running game so i lean more towards a repeat of the 580 attempts from last season. So I say you are anywhere from 20-40 attempts over expectation for 2024.
Samuel the last five seasons has 105, 97, 92 and 91 targets in four of the last five seasons. The other season he only played 5 games. His rushing attempts in that span per year are 19, 4, 41, 38, 7. Your projections are 75 targets and 55 rushing attempts for Samuel. I can see the 75 targets, but he is capable of another 10-30 targets based on past performance. The 55 rushing attempts seems highly unlikely.
For Kincaid I think we hope he hits 120 targets. 110 should be his floor. The top TE's in the game are all getting 120 -130 targets per season.