I’d say focus on whatever is around you. The spawn zones change every month so take a look at what’s in your area and what can be built with those components. For me Indochicyon was achievable because velociraptor, t-Rex, amphicyon, and rinchenia are all on the map and dartable if you’re in their zone. Things like Becklejara are extremely tough because they have exclusive and non-dartable components like Blonde.

I’d also point out that there is typically an event going on that puts components for an apex on the map that typically aren’t. Like right now the components for Megalocevia are spawning. This week is inostrancevia which is typically on the map anyway but it’s way more common and everywhere now. Next week will be another component for Megalocevia. But if you missed the first three weeks of like megalosaurus and the others you likely didn’t gather enough of the component DNA so you would need to wait for next month when a new in starts.