Hah hah, KNEW you had to have some EPtX DOFFs hidden away somewhere with that build. Nicely done. ;-)
Well I'd encourage you to "Give RSP a chance" (singing that in my head), it's my Holy Shit button. And one way I've gotten around your 'moar power' issue is to use a plasmodic leech console (yummm, thanks Michael), so one option might be to incorporate that and free up the AuxBat slot.
Agreed on ET, would LOVE you to have it, but three teams start to fall all over each other, and the 2 TTs are more important.
I've never used AuxSIF, and after finally taking a sec and reading its spec, it seems more powerful than I'd assumed. And I assume stowiki can't be right that AuxSIF1 really THAT much worse than AuxSIF2?
http://www.stowiki.org/Ability:_Auxiliary_to_StructuralDoctor: Totally greed on the benefits of TSS (cooldown, ally), I just found it was too weak and too slow, especially compared to things like EPtS and science team. However, as my aux level is generally pretty low, I realized that there's a high chance I'm dramatically underselling it.
So, just for giggles, here's where I'm ending up after being convinced that I was totally wrong on a number of points:
Eng: EPtS1 / AuxSIF1 / RSP2 (or reverse last two)
Sci: TSS1 or PH / HE2
So yes, the AuxSIF can help the hull repair better than I thought, and I'll assume that you can make TSS work better than I can, potentially through some dazzling power preset magic. However, I'd probably still choose PH over TSS as a counter to tractor beams. Still not convinced that the marginal extra power from AuxBatt is worth as much as an RSP (i.e., resurrect to full health from near death), or even a second EPtS given your DOFF choices.
Oh, and the pvpers are a race of highly seclusive creatures that only venture out from their dark caves to take pleasure from destroying creatures weaker than themselves. Quite horrible really. (And just as seriously, I should mention that, ideally, your second damage type should not be easily covered by armors that also protect against the first type!)