i tend to say fuck it to the rockwool. after an hour or so, lift up the lid, if there is lots of water dripping from it's underside, or just hung there, you'll be fine
it is VERY hectic, my next tote i've made up only has two clones in it as opposed to 4. i think the cramped conditions make the additional plants counter productive to the yield. i am notoriously bad at keeping my girls trimmed back though, i tend to let em go whereeverrr
your airstone situation sounds good. general rule though is mroe bubbles the better. i use just 2 round stones myself (round stone inlaid with orange platic. big hole in the middle) and the plants ent dead yet
i imagine that if your tote is setup coprrectly, then it's nothing more than keeping the rockwool vaguely moist and wait. once my clones are stuffed in, there is no farting about, i might pour half a shotglass over the rockwool here and there out of maybe they need it, but left alone and they just seem to do what they do and do it well
edit: one thing i should mention that i've been noticing, is that there is water underneath my totes every week, and i often find little pools on the floor. my thinking is that the increased pressure inside the tote as a result of the airpumps, causes the top section to mist up in a steam, which is finding the edges where the lid meets the tote and seeping out. i need to get a reel of thing rubber to glue down as a DIY oversize gromet essentially. not much water get's out, but enough to stain floors etc.