Never made one, but the numbers certainly look like you won't need it. Earth's embrace increases max HP by 40%, but you can't use it anywhere near as often. However, rooted has built in 100% HP regen, which means fully slotted health+rooted= 275% ADDITIONAL regen. Which is better than the regen of an unslotted regen scrapper with FH, integration, and health (one slot per means they beat you, but still!). A fully slotted Earth's Embrace gives you 79% heal every 186 seconds (3 mins), whereas fully slotted aid self is 39% heal every ten seconds (however most people would probably put interrupt reducers in there somewhere).
However, even if you do get it I strongly doubt you will need it. Not once have I ever seen a tank with granite on die from HP issues (although end drain or disorient them and they're just a high HP squishy). I suppose before that it might be good, but unless you're building with a respec in mind then I wouldn't get it.
It will be hard to use aid self when you are in the middle
of a moob and tanking, because of the interrupt time in aid self,
and if you turn off rooted and try to run away to use it
you can get held and stunned and get you team in big problems.
(shop some greens insted)
When you get Granite in lvl 32 you rather want a extra attack or some powers from the Power Pool Presence.
Because of the -recharge in Granite.
Alt's lvl 50
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Mr. H Boy
Ripper H
Venge H
Temp H
MR H
Ice H
OHHH YEAH H
Artific
Stoned H
Buckshot H
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Guard H - Defender lvl 25
Frezz H - Tank lvl 44
Shadow H - Scrapper lvl 38
I've seen Stone Tankers using it to great effect, for example right after a Tremor or Foot Stomp.
My Inv tanker uses it when he's in trouble, and he's purely resistance - throw a bit of defence into the mix and there's no reason why not.
DON'T eat muffins while I'm developing you.
Pants! Turkey Magnates! A man in a box! Rogue AI! Come one, come all, to arc ID 10107 - It's [i]'Not as long as some other arcs'[/i]!
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It will be hard to use aid self when you are in the middle
of a moob and tanking, because of the interrupt time in aid self
[/ QUOTE ]The interrupt time is very short, especially with few IntRdx enhancers.
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moob
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teehee
I would say probably not although it depends on if you plan on staying in granite all the time post 32 or using your other armours? Not much can take down a granite tank except groups with lots of psi mixed in. If you do start to get overwhelmed then a respite or two and a luck usually helps ease the pressure. 
If you find you have a free power slot and spare slots to use, then no reason not to get it either.
Well thanks for the advice i think ill skip aid self and keep earths embrace and rooted SOed up so i'll be fine.
Well im not used to tankers but i feel like making a tanker and leveling him up high. I have recently made a Stone/EM tanker and i am just wondering if with earths embrace i will need aid self?