I actually kind of like the way phalanx functions.... however it's potency is crap. The fact that fully merited phalanx II is the same as phalanx is pretty terribad. Almost as bad as the fact that all that +phalanx gear rdm can get wont help the phalanxes you cast on other people lol. I'd imagine fully merited base amount of say 100ish would be good with gear counting the caster not the recipient.
I like your spell examples especially if they aren't tied to merits for the reasons you state and how we are forced to choose and/or gimp but I'd add:
Dia/bio 4 with additions is nice to give similar versatility as geo but would like to make sure it's still the strongest dia/bio. Part of the meh about 3 is it's only 15% and your cor/rdm is getting 20% with it's dia II. Also make the effect enhanceable gdi.
Slow - part of what always irked me about slow was how full merited geared slow II was still weaker than poorly gear lvl 59 elegy from brd. Yeah they stack but come on. Though it beats geo so yay. But yeah given the regain/tp gain of mobs these days something to directly effect those would be a great idea. Perhaps a small plague effect.
Para 3... upping rate is nice but being able to para all the moves would be huge. Nothing more aggravating than seeing an nm be paralyzed over and over only for all it's moves to still work.
Blind - Unfortunately I see this as a non starter. Not because of rdm itself so much as SE seems really seems against it based on how many nms have capped hit rates in in full evasion sets. Plus like you said so much AoEs now and of those like 90% of the ones that matter are magic/breath and half the physical ones aren't blinkable. It's like they are deathly afraid of the old days of evasion/blink tanking
As far as the buffs I'd just really like to be able to use them on other people. The job has almost 40 unique self only spells... most of which sch can AoE or whm has the version that is naturally AoE. But yeah making them scale better ( and giving a bunch that don't scaling) would be amazing too.
Oh just noticed your tp down thing. Was thinking what about subtle blow II instead? The difference is slight but the subtle blow would stack better
and crap I missed a page lol