I understand his role is to defend against flankers but it doesnt seem like his abilities are super useful for that. i dont understand when and where his cages should be dropped. On attack he seems almost useless

So I was having a bad game we were losing 5-0, I was playing sova on pear silver lobby and I only had 1 kill so far then I picked up reaver vandal from our reynas dead body then boom ACE aftrr that reyna would just give me her skin start of...