Pillar of the caged god Champion.

Hi, so I'm pretty new to build making and decided I would finally try and create my own build. Overall I love tanky builds that can do respectable damage doesn't need to be massive. I love the pillar of the caged god and the way some champions have been using perseverance to scale there armor/evasion has inspired me to make a tanky boy build. The build I created I tried to somewhat simulate a league start, I know there's a few uniques I won't have access to day 1 probably in the build and especially the charisma anoint I understand. I probably would drop the purity of elements aura until I was able to achieve the anoint. But I was hoping people could throw me a couple tips on what to do and where to take this build. The goal I want is 100% spell suppression which I'm not even close to wasn't sure if I can get more easily from tree or gear. Also the DPS is lacking mostly because the only offensive aura I'm running is precision level 1 which would become precision level 20 after enlighten 3 is achieved. So mostly I'm asking for tips on how to increase the dps and also get more spell suppression and any tips or pillar of the caged god expert advice is greatly appreciated, thank you. POB

https://pastebin.com/gdLftdDm