Against something with 120 weaponskill, assume you have 120 weaponskill.
At 0 DCI you're 50% chance to get hit.
At 45 you're 34%.
At 0 DCI, but you manage to HLA your opponent: 37% chance to be hit.
At 45 DCI and HLA you're 25% chance to get hit.
I tried to see what 70 DCI (refinements...) looked like, but the stratics calculator is too old that it won't accept 70 as a valid DCI value.
If it's a question of imbue intensity, definitely find a way to fit HLA on your suit, since 50% HLA is 100 imbue weight (or 110?), but 45 DCI is at least 3 property slots, and a bunch of weight depending on how/where you get it.