Frag tank questions

[spit.fire]

Just wondering if you guys think egg crate is the best rack for a frag tank

I was thinking about putting down a real thin layer of Extra course gravel and I'm still unsure if I should put egg crate in

75% of the corals in the tank are zoas and palys, 20% lps and 5% sps (1 piece)

Tank specs
33g long
20g sump
Swc 150 skimmer
500ml biopellets
Phosban 550 filled with hydroton
Vodka dosing 1ml/ day
4 bulb tek t5ho
3x korilia 1

Livestock:
4 hippo tangs
2 anthias
2 clowns