I have to say I am absolutely NOT an expert in this but have had the same thoughts swirling around in my mind with my super.
I'm 55, so my goals are different to yours, but these are my thoughts (and some more questions LOL).
My super fund has some premixes which contain allocations that sound a lot like yours. And has some single class options. I find my self concerned that with the premixes that I don't have adequate control and that I'm not really sure what exactly in things like "alternative assets". But then with the single class options, I worry that I've missed out on some of these nebulous allocations whose purpose might be to reduce or counter volatility and add diversification, and secondly that I might presume to know better than the highly trained financiers running the fund. All in all a good basis for inaction!
Again just my thoughts:
Check out the costs of each option - in my fund some admin costs are more than others e.g. socially responsible is more expensive.
As far as I am aware re-balancing once a year is considered a reasonable way to go.
The same rules about not buying high and selling low apply, but in the premixes, at least in my fund, its hard to tell the exact price of anything specific, only an overall unit price. So when moving from a premix to individual classes be careful you can compare what you are doing. In my fund again, its not clear whether "Aussie shares" in a premix, are the same as "Aussie shares" in a single class for example. And again I can't buy a single class "Alternate Assets", so when you move out of a pre-mix you lose that to the extent you move out. I
These are just my thoughts but super is a tax sheltered environment so it makes sense to hold investments that make the most capital gain/returns in super. Stocks with fully franked dividends and lower capital gain might be better for monies held outside super. I started to get into all this but then realised at my age I was better just dumping into super, but I'd be interested in others' ideas about this FWIW.
Asset allocation is such a personal decision, you really need to decide what you are comfortable with. If you are locking the money up for 20 years, then one common advice would be to go for a higher growth strategy, which of course carries higher volatility and risk. Equally I have seen the advice that if you are investing for a very long time, then there is no need to go for risk, since compounding will get you there. It sounds like you've already read/know a lot..if you haven't try Bogleheads Wiki and the investing books on the investor alley.
Once retired its seems widely agreed thats its wise to keep several years of expenses (I like 5 years personally ) in cash/short term low risk and to start doing this in the 3-5 years leading up to retirement. But in your case this might be outside of super if you are going to FIRE.
I don't suggest you do what I'm doing, but just for interest I'm 55, planning to retire at 60 +/- 2 years. In super I have about 4.5 years expenses in cash (which I switched at the end of 2013) and the rest in a diversified premix ( my funds default option), which is a bit more aggressive than yours ( labelled 70/30 growth/income) with 5% cash/16%fixed interest/9% Alternative assets(defensive)/13%AA (growth),31% international shares and 26% Aussie. We'd had a couple of really good years in super and if I retired in 3 years ( best case scenario) and we had a big correction I didn't want to drop down too much.
I'm not sure holding cash in a super fund is exactly the same as outside though, since when you withdraw from the fund, I'm not sure you can just withdraw from the cash whilst you left the other part to recover. I guess by rebalancing you could effectively do this, but I have a feeling once you start withdrawing you may not be able to keep on doing this anymore. Something for me to investigate. Don't know if you've noticed, but there's a lot more info around about putting money into super, compared to concrete details about how to get it out.
Sorry for such a long rambly post.