Question about Fat Shark Dominator HDO

That depends on a few things.
About the glasses themselves: If you haven't bought them yet, don't do it now. the follow-up is already out. Unfortunately, it is 100.- more expensive on Digitec than it is on other sites.
The next question is which receiver module you have in it and how you want to fly it.
Module with diversity (Rapidfire, Achiles etc.): In most cases a patch antenna and an omnidirectional antenna are advisable. However, if you fly regularly behind you, use 2 omnidirectional antennas.
Modules without diversity: Omnidirectional.
It is also important what kind of antenna you have on your drone. Right-handed cannot be used with left-handed.
I personally fly with the HDO, Rapidfire module and 2 patch antennas. However, this is only recommended if you fly mostly just in front of you, as patch antennas have a smaller reception angle but a greater range.

ImmersionRC Spironet V2 5th

This sett gives you a good basis for a diversity receiver.

IMPORTANT: FATSHARK GOGGLES DO NOT COME WITH A RECEIVER MODULE, YOU HAVE TO BUY IT SEPARATELY!!! (Sorry for caps, but unfortunately many overlook this...)

LG