How i would change RDM if i could.

[Duelle]

Tank ? technically can but i suggest you secretly use a fake character and ask a VD group if you can tank ambuscade on RDM .... see how it goes.

Tanking is in a weird spot because heals can't be used to generate aggro (the Tranquil Heart trait). You need hate tools (enfeeble hate generation was nerfed), so you'd likely rely on whatever subjob you use. Gear selection to my knowledge is not stellar either.

Damage dealer - its gotten better but really low strength and attack is a problem.

Agree.

Healer - Yikes sub scholar is your best bet and those pages DO NOT come fast enough. too many debuffs for a rdm to realistically heal much of anything.

WHM tends to be more useful if you're main healing. /SCH seems to help for off-healing. Also, if you're healing you're probably not debuffing stuff as frequently.

Now unlike others, I want to actually fuse damage dealer and magic damage dealer. I think RDM should be a "one then the other" damage dealer.

When in composure I think RDM should get a stack of instant cast from opening or closing a skill chain

So if I'm understanding your suggestion, the RDM uses a weaponskill and gains a buff that allows the next spell to be cast instantly. On a concept level I really like this idea. That said, I can't think of a way to implement it, since this is the type of thing that gets relegated to a job ability (see: Chain Affinity, Burst Affinity, Immanence). This game isn't very big on procs/reactive mechanics, though it would definitely help RDM gameplay in the front lines.

and receive TP for magic bursting a SC while engaged.

As much as I would want this as well, the existence of Occult Acumen on gear (even if it's RNG) makes this unlikely to happen.

the main problem you have here is damage over time. RDM autos are low compared to other dd's. BLU stands out as a similar mix it up job, but their damage per hit and per ws is way higher ... and they enjoy greater flexibility as well.

Part of the issue here is gear. There's a lot of gear that BLU has access to that RDM doesn't. The Adhemar and Herculean sets come to mind along with older mainstay pieces like Epona's Ring, and addressing this would help a bit in closing the gap. This is evident when we note that our best TP sets are largely comprised of Ambuscade gear/Alluvion Skirmish with RNG augments, way behind what other jobs get.

rdm has no native way to deal with space herpes flying everywhere and they have no inherent AOE heal ... worse off they get kicked in the shins on regen ....i think honestly rdm should have the strongest regen spell even if they don't have all the tools scholar has to enhance it.

I wouldn't go so far as Regen V. Regen III would be nice. Regen IV appreciate but could prove to be too much seeing that Composure's duration boost affects Regen spells.

Mirror Image :: when in this stance the rdm creates duplicates of themself whenever you cast a healing or enhancing spell that can target another player the mirror forms will cast on a different ally (cure spells go to lowest HP, debuff removal goes to closest allied targets, haste goes to non RA classes, flurry to RA classes) to target ... this would however if it was a stance lockout Composure and making you have to spam buffs everywhere all day albeit a little faster to spam them.

I have issues with this idea, though I'll simply say you're asking for a lot of AI work. Considering modern devs don't even like the idea of smart heals, something as complex as this is unlikely for consideration.

Also, while I fully agree that RDM needs help in the attack area with regards to melee, the changes to composure along with the addition of the weapon Crocea Mors, turns RDM pretty effectively into a kind of magic monk, with auto attack damage in excess of 1k per swing on main hand when enspell damage is added.

Crocea Mors is a long and distant dream to a lot of people, though. I look at it the way I saw REMA weapons pre-abyssea; something I know is in the game that I'll never have.

That being said, I would still like to see RDM get some kind of physical attack bonus to help with WS damage. 16k Sanguine blade is great but once again it falls off sharply on bosses and even then 16k is nothing compared to properly buffed physical WS. Saber spell please.

That and unshackling RDM from /NIN when in melee would be a huge help. I've had LS members sometimes wonder why RDM wasn't given native dual wield like THF was, and have come to realize being able to sub DRK or WAR would definitely help the physical side of RDM's DPS potential.