Is it just me or 10 points in survival seems very important whatever build you go? Food is the most expensive thing in the game. Its not that pricey per item, but you burn through them quickly and if you rely on bought food that doesnt spoil you do not gain much profit when the mission is said and done.
In my experience you should always go to sleep when traveling with full hunger bar, which means frequent gathering. But without any points in sur you rarely have enough food spawned in virtually every place other than rain forest. So you have to refresh the map a second time. Its very inconvinient, and coupled with the fact that most of the gameplay you will be outside the cities, those 10 points in sur to unlock crafting are very, very important.
In most hard missions youll need lots of food, but if you buy it, you might not even gain profit from completing the mission. If you can make food that doesnt spoil, that makes all the difference in the world.
You could go for 15, but I think thats overkill. Potions dont sell for much and you rarely use them, so its better to just buy them.
With 10 sur and that fishtopia equipment, you literally have an aboundance of food, and you can craft into unspoilable food in bulk, you keep part of it for bad days and sell the rest. When I first started I never put any points in sur, but now I think its the most important trait. It just changes the game for me.