I was running Torment IV this morning on a Bounty Run and one of my bounties was, kill Zoltun Kulle.
Now, my build is a face tank build:
LMB: Spectral Blades
RMB: Arcane Orbit
1. Force Weap
3. BH - EH
So I killed all 4 of the other bounties and started thinking, "yeah...I'm not gonna last two seconds against Kulle's Behemoth's with this build. Bam - Bam - dead, will surely be the tune of that encounter. My build is weak against bosses who do focal damage.
Change the build?
(gasp) Blasphemy! You'll lose your Nephalem Stacks! - Nope, not anymore.
(gasp) Your build isn't efficient! Well...my build works MOST of the time...just not ALL the time..that makes it "inefficient"?
(gasp) Don't you have bonuses to Spectral Blades?! You're leaving those bonuses on the table?!...Yeah...for like 4 minutes O_o
My build is NOT 6 skills and 4 passives. My build is 5 skills, 4 passives and 1 Alternating Slot (AS)
It's still MY build though. Just because I can't use SB to kill Kulle doesn't mean I have to go back to the drawing boards.
In D3V it DID mean that. But I'm beginning to think...not anymore. You may list your build now and say, "yeah, sometimes I gotta go to town (or just to a safe corner since there's no penalty on active skill changes - passives still make you wait a minute) and swap this ONE skill because this PARTICULAR enemy type shows up. It certainly is a departure from our classic "Lock and Load" mentality.