Souldestroyer Reborn
Banned
About the enemies in your spoiler:Once you finish the War Within quest, you'll get some additional abilities for your operator. One of them is a beam that strips the immunities from sentients, so that will help.
Focus is earned as a (very) small percentage of affinity that rank 30 frames/weapons otherwise don't earn. When you pick up a convergence orb, this percentage goes to 1.25% for that duration (1.75% if you've got a greater lens instead).
They convert your affinity earned into focus, I believe at a rate of 1.25% of earned affinity. That's then used to upgrade the operator powers all the way at the back of your ship. The system seemed promising when it launched but I'm not sure how great it is. Only 2, maybe 3 of the schools are of any use and its pretty grindy being able to unlock skills in the tree. Also, there is one main power for each school, and then some extra skills you can unlock and use to buff that power. Good in theory, but the more extra skills you use, it increases the (already quite high) cooldown which is pretty counter intuitive
That all said, I believe they're looking at reworking, or at least tweaking the system to make it a little more exciting to delve into, so all isn't lost
Thanks folks!