Game conditions: 8 decks, 75%pen, S17,DOA, No Surrender, INS; 3:2. spread of 1-20

Ok I'm just a beginner so excuse my ambiguity to explain correctly....

In this game condition TKO says there is no benefit to use a ramp because there is no advantage using a ramp what does this mean..... if i reach the key count of -6.....and I wager 1-20 spread.....I have no advantage of waiting till i reach the pivot point of +4....to say that spreading (1-5 from -6 to -2) and (1-10 from -1 to +3) and then start my 1-20 wager once i reach that pivot point......basically what I'm asking is the key count of -6 until the pivot point of +4 what should I do.....granted that I'm not using it as a cover play.