At a certain point in the year, streaming stops working because everyone else is trying to stream defenses and starts holding 2 so you're stuck starting bad defenses against bad offenses which I detest.
I usually try to pick the emerging star/top 5 defense early in the year while everyone is still trying to rank offenses. Usually there's a star out there on the waivers in the first 4 weeks that you can ride till the end of the year and support with a weekly streamer if need be. This can tide you over if you fail to pickup the DST of the week on waivers.
I was trying to figure out which offenses to avoid vs start against and this is the list I came up with. Some teams just faced poor competition so I don't think their current fantasy rank (shown) is deserving.
Top waiver wire DSTs (ESPN Standard DST Scoring)
Based on list below, I looked at the top 14 fantasy ranked defenses that have lower than 70% ownership per ESPN standard DST rules.
3 - Carolina - 5 bad, 4 good, 3 neutral
5 - Arizona - 7 bad, 3 good, 2 neutral
6 - New England - 6 bad, 3 good, 3 neutral
7 - Cleveland - 5 bad, 3 good, 4 neutral
7 - Chicago - 8 bad, 3 good, 1 neutral
9 - Cincinnati - 7 bad, 3 good, 2 neutral (including JAX)
10 - Dallas - 3 bad, 2 good, 7 neutral
11 - Indianapolis - 4 bad, 4 good, 4 neutral
12 - Philadelphia - 4 bad, 2 good, 6 neutral
14 - LA Chargers - 4 bad, 2 good, 6 neutral
Dallas, Indianapolis, LA Chargers, and Philadelphia all had two tough matches in first 3 weeks so they may be better than their current rank and could potentially do better over the rest of the season since they have the most neutral / favorable matchups going forward (8+)
Cowboys and Colts have a great few games after this week. Then you need to pick someone up for week 7 and beyond. Browns, Eagles, and Chargers have terrible matchups until week 8 and then they only have 1-2 bad matchups after so they fit in perfectly. Can probably grab one of those in week 7 as I expect their ranks to fall before then.
Carolina, New England, Cincinnati had two great matchups in the first three weeks so they may not be as good as their rank indicates.
Arizona, New England, Chicago, and Cincinnati have the worst schedules going forward with 6 or more unplayable games against top tier teams.
Fantasy Rank - Bottom Worst Offenses - Start Against
32 - NYJ - Must start
31 - ATL - Must start
30 - CHI - Must start
29 - JAX - Must start
27 - MIA
26 - NE
24 - PIT
23 - DET
22 - IND
Fantasy Rank - Middle Offenses - Unsure of team quality / Start if good DST or key injuries to O
13 - HOU - Start against as long as Tyrod is out
27 - CIN - Think they are better than their current rank / bottom offenses. Bears game heavily skewed it. Wouldn't start weak DST against them.
25 - TEN - Think they are better than their current rank / bottom offenses. Cardinal game heavily skewed it.
20 - NO - I think the Panther game where they had 8 coaches out was an aberration so they may not be as bad as current rank
20 - PHI - They did not do well against SF and DAL but crushed ATL. Willing to start a good defense against them if favorable matchup.
18 - NYG - I could go either way on this - I think they are middle of the road.
18 - WSH - Not afraid of starting a good quality defense against them.
16 - DEN - Their competition was so weak that I don't know if they are really this good. I'm not afraid of them.
15 - BAL - I do think this team is better than its current rank but struggling right now. Iffy start.
10 - CAR - I do not buy that they are a top 10 offense granted the caliber of their opponents so far. This offense runs through McCaffrey and I'm willing to start against them without him.
Fantasy Rank - Top Offenses - Bad Matchup / Do not start against
1 - MIN - I think Kirk Cousins is playing as good as ever and I would not start anyone against them. ARI week 2 scarred me.
3 - LAC
5 - ARI
5 - DAL
5 - LAR - Unstoppable. Super bowl bound.
5 - TB
5 - SEA
10 - KC
16 - GB - That week 1 was a fluke. NO just out schemed GB, I don't think other defenses will be able to do the same.
14 - SF
5 - CLE
10 - BUF - Bad start brought their rank down but I would not want to start a D against them going forward.
2 - LV - I'm still not sure if LV belongs here or not. I definitely don't think they are top 2 but not sure if I would say you absolutely can't start a D against them yet.