SMALL DB slotting question

I've been staring at Mid's Hero Planner (old and NEW versions) for a couple of days now, as I respec my 50th DB/WP scrapper. Overall I'm pretty happy with the new build on paper, but I'm in a quandary as I try to six-slot two powers for the IO set defense bonuses. I've decided which SETS I want -- one Mako's Bite set, one Touch of Death set -- but not the "where":

Ablating Strike -- level 50 Mako's Bite, or level 40 Touch of Death? I recall slotting this looong ago for extra recharge since it's used in three combos, so the extra recharge from Mako's wouldn't hurt -- ToD has a 43.43% recharge bonus versus Mako's 66.25%. (And like many here, I mostly spam Attack Vitals and Sweep, but every once in a while I'll use the other two, like when I exemp down or miss another combo.) Since it IS in three combos (and leads off Attack Vitals) the extra accuracy from Mako's WOULD be nice -- Mako's has a 66.25% bonus versus ToD's 43.43% in accuracy as well!

Or maybe I should put the ToD here, since it's a lower base damage attack than Vengeful Slice, so when I miss it's missing with less damage?

Vengeful Slice -- here's where the other of the two sets goes. It's the heavier hitter of the two attacks, so perhaps the slight extra damage from ToD's set bonus would pay off here. Until or unless I miss more often because the accuracy bonus is lower...when I was fighting level 52 and 53 mobs, accuracy wasn't that big a deal for me, but with 54's nowadays, and their accuracy debuffs? Hmmmm.... /e headdesk

I'M thinking "six of one, half dozen of the other." Ideas, suggestions, or other obvious pro/con points that I missed would be welcome!

Wow -- this has been here since yesterday afternoon and there's NO replies/LOL's/opinions yet?

I think I'll take this to mean that my original "six, half dozen" assessment was right. Maybe I should just flip a coin?

5 crushing impacts (no dam/end) and an achille's heal proc

Actually, my first thought is to ask why you are slotting sets that give primarily positional defense on a typed defense secondary. A good slotting for Abalating Strike is, as stated above, 5 Crushing Impacts + an Achiles Heel proc (if you want recharge), or 4 Kinetic Combats/Smashing Haymaker + whatever you need to get the damage, accuracy and recharge up to satisfactory levels (if you want defense).

Assuming you use Blinding Feint > Attack Vitals combo a lot, the set with the higher recharge should go in Vengeful Strike since it has a higher recharge requirement (I don't have the exact numbers on hand, but someone will probably show up with them soon) in order to run the chain gapless. That said, Vengeful Strike is really a very poor attack due to the long animation, so if you mix up your attacks and running a gapless ST attack chain isn't all that important, I would put the set with higher recharge in Abalating Strike.