The the shark layer was due to the hegbug layer being analogous to scale mail: i.e. a collection of hard plates backed by a softer, more flexible layer. This was due to the fact hexbug is rigid and indestructible enough to damage it's mountings IIRC, and I was hoping such an arrangement would alleviate it. Though, if we're going to layer it like you suggested, we might not need the shark layer for the flexibility, so that can probably be omitted.
However, an arrangement like I described would probably be perfect for battlesuit armor. Someone wanna go prototype a standard battlesuit with a double layer of the armor arrangement I outlined?(for reference that'd be a double layer of the 45-60-45mm mix I came up with)
Also, the reason I want hexbug backing the hexplate is that while hexbug isn't laser-proof, it's still fairy laser resistant according to PW, so it still offers a bit of protection from energy weapons. Hell, we can go a hexplate-shark-hexbug-shark setup
Edit: Now that I think on it, a hex-shark-bug-shark layering would probably be the best way to go. So, make it a 30-30-30-30mm layering and repeat ad infinitum until you have the desired thickness. The pro to this is you have a laser-proof outer layer that can be hled together by a regenerating middle layer so that it still remains somewhat effective, backed by a hard kinetic(and laser, though not as much as the hex)-resistant layer also kept together by a regenerating layer if cracked.