IND is going to bring it. Miss a few shots in a row and they are going to run it right back at you. Haliburton is a very good individual player, albeit one with some durability concerns. And they have some size, Turner, Siakam, Toppin is a decent big rotation. Better than Horford, Kornet and Tillman (until Porzingis is back, at least)
I would suggest playing some zone. When you are trying to get back on D and find your man, that is what they take advantage of. If you can just head back on D to a spot on the floor, I think you can get the defense set quicker. Does anyone know, did MIL or NYK try any zone against IND?
With the amount of 3s that BOS takes, and invariably misses, there are a lot of opportunities for IND to run out. That can lead to swings. BOS may hit 4 of 5 or something for a stretch but then only 2 of the next 10. That is what IND is geared up to take advantage of.