Analysing your fund's performance by the number of "base units" isn't helpful. The return is on the balance you have invested, not the number of units.
You also seem to be focussing mostly on dividends (which is no doubt driving your focus on number of units), while giving only a passing nod to capital growth. All that matters is total return, especially when the bulk of your funds will be tax free in pension mode. Before then, capital gains will be taxed more favourably than super and will be contributing more to the performance than dividends anyway.
I can't really follow your reasoning after that. You have only 2 things to consider. Do you put your cash into shares as opposed to leaving it in the bank and (independently) do you use super as the vehicle or not ?
If you don't need the money in the short to medium term as seems to be the case, I'd say that the answer is put the money into shares in super. If it's in super, you can always get it out again and if pension ages are close/passed then waiting time is not a factor. But once caps are passed then you can't get non-concessional chunks in there and the option goes away.
Also note that until your taxable investment income per annum exceeds about $53k per person, then there's no tax savings by having money over the transfer balance cap in accumulation mode in super. There's no tax-free threshold for income paid in accumulation funds.