Okay, so... This isnt really a new RO Build.
If you are new to RO and play an alchemist, stick to an AGI build...
I havnt seen very many guides on Alchemist Support Builds other then some Tanky/Pot thrower. So, I was playing like this for a while and I thought it was cool. Id think this is strictly for Non-Trans, because I have not done Trans+ as this yet. But so far it seemed pretty cool.
First things - Stats.
LUK, DEX will be your main stats. by 99 Id recommend high LUK. Luk effects your Flee, Atk, Critical, and your Hit. Not only that, itll effect your battle brewing. (lol)
90+ Luk
80+ Dex
45 Int
Int was the 3rd Stat, Brew type stat. Additional Bonuses is it increases your Magic Attack. Which if you have things like. Fireblend, Ice Falchion, Clip of Hail. Auto Cast type items. Your magic damage will be a bit influenced.
The rest of your stats should be lower then 10. If not 10. Then 1.
Second - Items
I say anything defensive depending on what youre battling. i.e. If youre fighting fire, where a Of Ifrit. And so on for your body.
Weapon is something like a fireblend. The magical part about it is. If youre using autocast gear. You should also be using Plant Bottles. Around lv50+ you should be using lv4 plant bottles. Why? Because they count as regular attacks. Which will cause you to autocast things like Clip of Hail, or Fireblend or any other autocast ability.
Auto Cast Items? Well the items I used were Fireblend, Clip of Hail, Clip of Double Damage(i think thats the name). Which when Clip of double damage, by homunculus would do twice the damage or whatever i casted hail or fireboly would do twice the damage. There are more out there so being creative is essential.
Homunculus -
The best you can do is get your favorite homunculus and get it to similar level as you. Tho, i hear vanilmirth gives brewing bonuses (Which I think its lame because that means a brewer is stuck with one homunculus). Tho, if youre gunna do this type of thing only on your alchemist. It probably be really beneficial to get a Lif. So you have you rhomunculus support you while you are supporting others.
IN BATTLE!!!
Ok, so this is the dirty work. What you do is carry potions, brewing material, and all that stuff. In between healing. You attempt to brew a potion. This is why you need to carry brewing material. Tip; Do not brew over your weight limit. Because you effect your natural mana and health regen.
An additional bonus is that. If youre in an area that drops herbs youre brewing or can brew. It helps! On another note, while youre leveling your homunculus. You should gather empty bottles you find. I know Ant Hell, Ant Eggs drop them like crazy. Collect any and all herbs you see. If youre rich you can buy them too.
Important thing to mention is... you should be creative.
Money is good too....