Description of Research Points assigment
The tree has 4 ( spot 8,16,24,32 ) survivor slots nodes which has to be picked up first, then we can proceed to expanding the tree.
The preferred way to assign points Offense > Fortitude > Tech > Resistance.
Follow the numeration to get the most efficient patch. This is the final tree.
A really important advice – Once you unlock the 32 nodes go back to your Tier 1, Tier 2, Tier 3 Trees and pick up any small stats nodes. Simply because the research points cost is much less then purchasing a one node in Tier 4. In the last tree each node costs 4000 points, you can easily unlock 2 nodes in Tier 1,2 for that price and nearly the same in Tier 3.
Please mind that the research points are hourly generated.