I'm on Chapter III, just beat the first mission, and cleared the D-rank Arena fights. The game is sure getting pretty damn hard, even with Songbirds and Gatling guns, after rocking a balanced plasma blade/ verticle missle duo, and laser cannon balanced combo.
I'm starting to feel that the heavier builds (tetrapod, tank...) are generally more viable for bosses than lighter builds, since you usually are required to dish out massive dps and heavy weaponry. Since Balteus I haven't beaten a boss with a lighter build, but would like to try one, since I really love the blazing dash motion and evasion. All bosses in Ch 2 required tetrapod, as did the final mob/ship sequence in the first chapter of Ch 3 (which was very hard). Maybe this will change in the short term. I'm not using my extensions-shields properly.
It's an amazing game. I just wish the difficulty was a bit more balanced. The missions are very easy, while the boss fights are extremely hard. I like the idea of feeling like a badass for a wee and then facing a challenge, but a middle ground inbetween would be welcome. Not a big fan of the storytelling style on this one either, but I tend to get into the story later with From games anyway.
Balteus so far is my favorite fight. One of From's great boss fights imo, for the ages. Amazing soundtrack.
The game is absolutely stellar.