I’ve fought the tank/spider a few times now and every time it’s been a slog. It has some of the more annoying abilities grabbed from other bosses, ex the Eidolon’s stomp, and seems to have the most staggering attacks out of all bosses, or at least uses them very frequently.
With most other bosses, even the more annoying ones like Kela or Profit Taker, I’m mostly thinking about how to play better using normal means to beat the boss… with H-09 I am just thinking to myself: ‘OK, how do I cheese this?’ for most of the second phase.
FYI I used a Vasto Prime Incarnon when I cleared the Steel Path node and it absolutely shredded the weak points, even when I was firing it from quite far away. Laetum works wonders too, at least the status/raw damage version with the no crit evolution did. Incarnon guns are generally great because the weak points in both phases count for granting them charge, makes keeping them transformed during the fight trivial (it helps that they are generally incredibly powerful guns too). Just avoid anything that relies on status, the weak points are immune.