well, that's something.
this is the umbraless build that uses blood altar. you can pretty much swap blood altar with gloom if you want a more active playstile (you don't need to regurgitate the enemy, just become ball and yump once to refill your hp)

the main point for this is to keep eating for gaining extra armor, buff and, by all mean, nullifing 30+ enemy's by putting them in your belly. keep up the health with the hellminth ability and kill with ball or burp. keep a gun to killl or overguard strip the eximus

for the umbra variant you will use the full set, swapping out Amar's with umbral fiber, i will post another build for the umbra variant. (https://overframe.gg/build/339793/grendel/the-big-eater-2-umbral-boogaloo/)