Teaser advice

Teaser advice Using tactics and ideas generated by two respected guys on this forum I've come up with a teaser this week and want some input. KC -2 NO -5.5 Both move the line through good numbers and I think appear to be on the right side to begin with. Anyone?
if you want to have a potential +eV nfl teaser, you must always tease nfl sides completely through 3 and 7 (dog +1.5/2.5 up to +7.5/8.5) and of course (fav -7.5/8.5 down to 1.5/2.5). only play the conventional 6 point nfl teaser 3 teams at +180, or 4 teams at +300. reading the market and timing your bet properly will be the final determination in having a solid +eV teaser bet.
KC Good NO Bad As Sundown pointed out
It also helps greatly to be able to handicap yourself. You want to be able to avoid teasing teams that are +2.5 when they "should" be +4 or teams at -7.5 when they "should" be -6. A lot of pros see losses playing teasers because they attribute a certain value to teasing through the 3 and 7 without taking into account what their handicapping tells them.

Still trying to learn here. And I know that 3-7 is the number to tease through but if you tease through 10,9, 7 , 6, is there no value? Or is it the mantra of games land between 3 and 7 xxx%. And yes I don't know the percent. I'm just looking at key numbers and if I see a discrepancy and say well okay this team should win by a touchdown and the number goes through 7- 6,7,9, 10- what is the ev and what is wrong my logic?
with my logic. sorry- I don't speak pigeon english.
Your Saints points are worth less than 20% and you need closer to 25%.