I am really, really not into builds and extracting the best from them but my Magplar is the character I go to for pretty much every type of content, she is Breton though not Argonian.

I just thought I would tell you the sets I use because they are very easy to aquire, however I must say I would never run without jabs, especially when soloing stuff.

So she wears 5 x Order's Wrath, 5 x Deadly, 1x Slimecraw, an Oakensoul ring and currently Thief Mundus.... I have never coped well with bar swapping, so Oakensoul is great for me.

I use a lightning staff but I believe daggers are viable for mag builds too, although I have no experience of that.

This setup gets me through many 4 mans solo, WB's also Solo and with a tanky companion is fine for up to Arc 3 in IA, probably further but I get bored.

Anyway it's easy to aquire and cheap, so maybe a great starting point to see if you like DD?

You can save your healer "loadout" in the armory and create a new build which you can save as build 2. It's not that big of a deal anymore with the armory. What you will run into though is the fact that while Argonian is quite ideal for support roles, its not really well suited to be a DPS character. Not that it will be bad, but you can expect to perform roughly 5-7% lower than one of the top DPS races (High Elf, Dark Elf, Khajit).

As for build, it really depends on what you want your focus to be. If you want the best single target you can get, you can go relequins and deadly. If you want better overall performance against groups, Sul-Xan's is great to give you increased crit chance/damage vs. groups. War Maiden is good for giving you a huge boost to your magical damage abilities. There are a lot of sets you could run, but there's pros/cons for each build so you need to figure out what your focus will be and then build around that focus.

I agree with Relequen or Ansuuls on the body, and can add Whorl to that list. If you are using Deadly Cloak, Berserking Warrior jewelry and daggers on the front, VMA flame staff on the back, and either full set of Kjalnar monster, or kilt + 1 piece Slimecraw. Or go Soulshine with a staff instead of Berserking with daggers and go with Velothi amulet + 1 piece Slimecraw

@ArchMikem Templar, in one of its many nerfs, has run into a rather persistent sustain problem, and its not because of melee weapons on the front bar. Which is annoying as Magplar used to be one of the easiest classes for damage, rotation, and sustain.

A lot depends on if you are running raids, trials, or solo content. Obviously raids will give you synergies and buffs for sustain. For the others, a normal light attack rotation should be okay to keep your mag on the front bar at a low but sustainable level, if you can be comfortable with that. If its still close, I've used Radiant Aura for regen. If neither work, or you are uncomfortable with low mag resources, just double bar staves. Its not a massive dropoff in damage; however, you would not be able to run a melee damage proc set like Berserking, but you could use Mother's Sorrow (the old tried and true) or just go meta with Nirn weapons and jewelry.