Look at your design and distribute the hosts carefully. Remember for the first time when you start adding your hosts to the cluster it will be treated as first come first serve.
So if you have 2 full house Chasis (32 nodes) then carefully add the hosts into cluster one by one. I would suggest first add 3 nodes from one chasis and then add the other two from other chasis.
So in this case even if one of your chasis fails, you will still be benefitted by HA as other nodes will be able to restart those VMs (depend on % available resources).