Salam
Just like the title asks- why do angels exist? What important purpose do they possess? Other than jibraeel's duty to convey revelations or the angels that played part in our testing (harut and marut, the angels that were sent down to Lot) I can't imagine why we needed angels. Do they have a test of their own? But because they can't sin and have direct proof of God, surely they can't be tested. So why did God create them? Just to worship him? Some don't seem to possess a "true" purpose either. I say true purpose because some (as far as my understanding goes) don't seem necessary at all. Ridwan the guardian of heaven and malik the guardian of hell- why do we need angels guarding these? Malik's responsibility to bring rain- i thought God says be and it just is? Although I couldn't find solid sources for that, sounds a little pagan-like too. Do angels get to experience paradise with us too or are they to continue their duties? Ridwan is the guradian of heaven and heaven's existence is eternal- would he be stood there guarding forever? And malik, is he to watch souls being tortured for eternity? If i'm not wrong, iblees is to dwell therein forever.
Hope to have some answers.
thanks for reading