Is Dynamo field worth it if you only plan to put 5 points into it? I'm trying to come up with a tweak from my old 2h build, relying mostly on Onslaught for mobility and damage and then regular attacks to gain charge for FF. After getting everything I want it seems like I'll have only room for 5 in Dynamo field.
If I didn't put points in Dynamo field I'd probably move them over to Charge Domination, for reference, and rely on that proc a bit more.
Link to Build: Engineer 49/33/50
Onslaught is a pretty awful way to get your damage, honestly. But, as far as Charge Domination is concerned, it reaches maximum efficiency per point at 7 points in it. That gives it an, on average, ~50% chance to have procced per 10 enemies killed. Still, I wouldn't rely on Charm Domination instead of using Dynamo Field or something that consistently generates you Charge.
I've been browsing the official forums for a few days but there seem to be a lot of conflicting opinions and tbh, I don't value the input of people on official forums very highly for any game.
There's been a fair amount of good theorycrafting and testing done via the forums.
For a mainly focus/vit build I'm thinking something along these lines should work:
46/45/40, but there's several things I'm unsure about.
Firstly if it's worth taking both Supercharge and Dynamo Field, obviously having both would mean more benefit from Charge Reconstitution, but I'm used to getting most of my charge from Charge Domination so I'm unsure on their effectiveness.
Supercharge is nice to have and it helps increase your Charge rate but Dynamo Field (or Shield Bash, if you'd rather do that) is the best way to actually build up Charge. Supercharge is more for doing more damage with autoattacks rather than a way to generate charge.
On the subject of Dynamo Field, Shield Bash is a notably alternative that helps your survivability. Something worth keeping in mind for Hardcore.
I'm also unsure about the value of Bulwark and Aegis of Fate, I imagine Bulwark is the better of the two, especially as it would increase the effectiveness of AoF.
Aegis of Fate just isn't that impressive of a skill, sadly. Forcefield at 100 is around a 60,000 shield. With enough DR% (which it scale with), it's just hard to argue against it, even if Aegis of Fate is less Charge reliant.
Thirdly what damage skills are worth taking. Currently looking at some mixture of Seismic Slam, Emberquake, Shield Bash or Fire Bash. Also I think a single point into Tremor should be valuable for the debuff, especially on longer fights.
Emberquake/Seismic Slam/Dynamo Field are basically your offensive options. Fire Bash is nice for the synergy with Emberquake/Seismic Slam but it is fairly reliant on a lot of points. Shield Bash/Fire Bash just are not things to consider for high damage, however, more for their utility. I guess the same applies to Dynamo Field, really.
The Tremor Debuff isn't that big of a deal with the limited amount of Physical damage you're doing. Worth mention is the Immobilization Copter debuff. It'll help with your survivability and 10 points of it (worth taking from Charge Reconstitution*) actually gets an okay damage from it. Plus, more bots.
*While a nice skill to have, you're generally blowing all your Charge on Forcefield rather than consistently blowing them to keep triggering the heal. It's just not as helpful as it could be.
Lastly stat distribution I was thinking 3/Focus 2/Vit, maybe moving the 3rd in Focus around depending on gear requirements and such.
Some DEX is worth taking after you reach a comfortable level of VIT (53 for 10% Block, 113 for 20% Block). Lack of STR hurts itemization so you're stuck equipping Tank gear as you meet the level requirements. Not exactly a "bad" thing, just something to keep in mind.