honestly you do seem like a newbie in mmos simply because you dont test out things first like crit affecting HoTs and what spd does for it. you just say "oh i heard it does this so it must be true".
also, i have played wiz with all sorts of subs, ive been a wiz main since OBT. ive tried all sorts of things from wiz/gren to wiz/necro. heck i was even wiz/guard for fun a little while, roaring for my party mates so they all get the loot. i was a wiz/sorc way back when people didnt have above 100k+ hp and people still needed gs as sub to cap spd, this was the point in time where smaller HoTs actually mattered. but then again, this was the time in AK where it was "get1shot by the boss or live with a sliver of HP and heal up TO FULL asap before the next boss attack hits". this part mostly hasnt changed for average geared people like me. in case youre gonna say im not average geared im still wearing full level 80 Lordswrath +20, theres already lvl90, s1, and s5 gears available and +30 is also there. for better geared people with 500k or more hp, those 3 rejus wont cut it. HoTs of those isnt enough for that. i tried those things you keep saying i havent tried. ive experimented with wizard way too much on things i have access to, and let me tell you again. your idea of a wiz/sorc is not worth it. it doesnt have potential and is mostly a for-fun-and-not-gonna-take-endgame-seriously build.
oh guess what, i do play wiz/bard sometimes as a support but with full dps gears. healing in vaultpt stage 3 is sometimes required of me. but you know what, my heal still full heals a 500k hp person with healing harmony if it crits. thats something all three rejus cant do.
also that 30sec cd im talking about is with cap spd. i guess you dont know wizard ulties have 60sec base cd. im not 100% but i think all envoy combos are like that unless you use masteries(which youre gonna exchange with either deepblue or bestdefense, another tradeoff go figure).
still not gonna stop you from making it when you already said it yourself that "Wizard isnt fit for healing", but you know, someone else might think "oh this might be a great idea" when its not. its a forum after all and maybe a newbie comes in and sees this and tries it out, then gets disappointed when they see a bard sub healing much more than they did.
edit: coz u mentioned my stats without armors
mount is iceskilldmg. yeah maybe its horrible(to me its okay) there are other people with higher base stats than me simply because they are s5, got more eidos, more card forts, and more achievements.
-To add your comment on Nocturnal doing way better, so? Is there something, a barrier, against using them both? Okay, Nocturnal is really good, so use them both. You dont have to stop using your regenerative abilities just because nocturnal is better.
simply because nocturnal scales with dmg. it heals you up the stronger you are. yeah it doesnt stop you from using both but nocturnal heals you more than reju ever will. relying on reju first and noc later is actually a bad choice simply because it wont heal you up that fast when you need it most. only time you actually use reju to heal is when theres no mobs to hit or you're kiting something that should not be hit (fake panthers for one thing).
oh also sorc reju void skill isnt reliable, as a wiz u wont really be spamming sorc skills to fill up your void bar, only normal reju mantra so thats gonna be slow, then its gated by rng, u might not get mantra for a while if rng decides to screw with you.