


The dual Big Sisters fought one level earlier are the real Climax Boss of the game (although there is also a very tough battle royale involving multiple splicers at the very end, that battle is not very difficult if one uses Summon Eleanor or even just has two security bots operational). It is also possible to quickly kill him by simply hacking a gun turret found in a neighbourhood room and then hacking a security bot nearby and letting them do the job.

Heck, since you have the Summon Eleanor plasmid by this point, she can kill him for you before you ever enter the room. Even conventionally, the battle won't last much longer than 30 seconds. It's not an exaggeration to state that Incinerate 3 can One-Hit Kill him on the highest difficulty, in tandem with the hazards in the room (though this is unlikely). Alpha Sinclair, only has the benefit of a longer health bar, a triviality to anyone who's maxed out on their research of the Alpha series. The Rumbler is objectively powerful, with its limitless mini-turrets and rockets, but much like a rocket turret, it's more or less completely shut out by the Telekinesis plasmid.
