as far as I understand it sternguard only get two heavy flamers so that is not a bucket load
Every model in the unit is entitled to a combi-flamer (boosted by Vulkan if you take him, and really, why wouldn't you?), and incendiary bolter shells that ignore cover. I'd class that as a bucket load of burny stuff.
and I don't want T5 marines
Unless I'm misinterpreting something here, this runs counter to what you said two posts before:
, but have the rules be more like: [...] all the models have drake scales which makes them toughness 5.
So clearly T5 entered into your thought processes somewhere.
I just want a specialized unit that has drake scales and flamey stuff... the comments are telling me that an invul save is not cool for a unit of marines.
I'm practically giving you a unit that has flamey stuff! You're just not seeing it for whatever reason.
And no, the I-save is not cool, because A) it conflicts with your theme B) some Codices have units that ignore I-saves, and considering that the Legion don't have armour saves (by RAW), you're absolutely buggered if you face off against old-style Witch Hunters. Psycannon bolts and Blessed Promethium will completely wreck a Legion unit, and I'm sure you'd find it jarring for a unit of Sallies of all people to be running scared of a big flamer.
I am ok without the invul save
EMPEROR BE PRAISED! Finally.
but the drake scales have to do something
...Uh, look impressive? Distinguish them from other Marines in power armour? Generally showcase their badassery?
otherwise they are just going to be sternguard
This is in no way a bad thing.
but they are not intended to be sternguard: hence I went through all the trouble to come up with fluff and whatnot for a special unit.
Then pray tell, why is it not in the Forge?
so they should be special, not just an elite unit for a vanilla marine army.
Synergy, mate. You play Eldar, you should know what I'm talking about there. Sternguard get loads of flamey stuff. Vulkan makes flamey stuff better. A blinged-out Rhino can get them to the front lines, or indeed a drop pod if you want to preserve the deep strike. See what I'm getting at? 'cos Sallies sure as hell aren't vanilla -- they're more like a mint choc chip. And there are ways to get that across.
so, i guess what i want is advice on making a special unit. not advice for being a codex marine player and following what is in the books.
From what I gather a good player can devise any number of different themes without leaving the confines of the Codex, and Codex: Space Marines arguably has the most options to play with for creating your own army as you see fit. So this should be much easier than with, say, Dark Eldar, or Orks, both of whom are much more restricted in terms of theme-choices.