Never heard of nekton tbh.
The only CGD i would use is repashy ! it is by far the best diet out there for cresties. In the UK (lillyexotics is the uk distributor of repashy) they have the latest version, V3 and it now comes in two flavours tropical and mango - i would definitely suggest using repashy over clarks.
Live food i use hoppers, crickets and mealworms and dust with nutribol i probs give them live food about once/twice a week
0.0.1 Aru X Manokwari GTP (M.Viridis)
1.0.0 'Pisky-Be' Panther Chameleon (Nosy-be X Ampiskiana)
1.2.0 Satanic Leaf tailed Gecko (U.Phantasticus)
1.1.0 Henkels Leaf tailed Gecko (U.Henkeli)
2.5.0 Crested Gecko (R.Ciliatus)
1.0.0 Corn Snake -