FA is definitely "not needed".
I use it for the Tohit debuff resistance more than the +acc and +tohit it gives.
Depends on what your overall accuracy is.
I like to shoot for 90-95% accuracy when attacking +4's. Anything over that is great to handle to-hit debuffs or added defenses.
Focused accuracy helps a lot, but isn't necessary.
At +3s your base to hit chance is 48% before any debuffs or buffs or any enemy defenses are calculated in. http://paragonwiki.com/wiki/Attack_Mechanics <- Link for attack mechancis. Also, I was recently shown if you go into mids and go to Options -> Exempting and Base values -> Base tohit, you can alter the percentage for your base hit so it shows the actual values you want to see in mids. I set mine to 39% for +4s and then work from there. If I can hit a +4 95% of the time, I can hit everything else 95% of the time too (Excluding the previously mentioned buffs/debuff/etc.)
If you have enough accuracy/tohit bonuses to where you feel that you are hitting enough to suit yourself than FA shouldn't be a problem to drop.
As for aid self, it adds a large amount of survivability to super reflexes. It's definitely a smart pick.
Play with Focused Accuracy off. Are you satisfied with your to hit rate? Then drop it. Is it close? Drop it and get more accuracy bonuses, and/or pick up the Kismet unique if you don't have it. You don't need it for AVs, though, unless you're fighting uplevel AVs.
Aid Self is very much worth it on SR for things like AV fights. However, Rebirth is another option to consider. Some SRs even make do with a lot of regeneration bonuses.
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Thanks guys, I speced it out, pretty happy with the results of Aid Self + Spiritual Alpha boost to healing..definitely worth it.
On a different note in the same build, I'm so close to getting Hasten-perma...
I have a DB/SR and I'm looking for some advice from people with experience.
1. I'm looking to get rid of Focused Acc, but keep Phys. Perf and Conserve Power. I consistently fight +3s and looking to build a toon that can take on AV's. Is Foc. Acc really needed? It's an end hog and even 3 slotted, the end consumption is still pretty high.
2. If I get rid of FA and go to the medicine Medicine pool, Aid self worth it for SR?
Thanks in advance!