Soul Arbiter without the enemies would be weak sauce. The last wave was ridiculous because the boss decides to attack while having his hax shield up while fighting alongside a sub boss type enemy who can block everything.One of these days, developers are going to figure out that you can make a fun boss fight without adding 100+ weak enemies to the mix, and it will be glorious.
Just the boss is all we need. The extra stuff adds nothing but annoyance.