Originally Posted by
Draken
Some ascendancies and perfections provide benefits that you have to build around to make full use of. It is noteworthy, however, that the elemental and plant ascendancies are particularly weak due to the types themselves providing some severe benefits (critical immunity, for starters).
Further, while yes, you can get immunity to energy damage as early as level 5 (here I was sure it took 35 resist to get immunity, uh, wonder when I changed it, might revert it to 35 again), actually doing that isn't a great idea, since resist 20 will on average block all damage until... 7th level. And droping that many mutations into a single specific defense so early is a very unsafe proposition unless you are adventuring on the elemental plane of fire.