soul,
reread my post. u can get these dragons without deus' vault. deus' vault just give's u the right breeding combination to breed these dragons, that's it. what's important is the level and position of the dragons being breed. i had a member pm me telling me they got the jelly dragon using this method. sure it takes time to breed em and all, but totally safe for ur game. give it a try if ur all out of options.
also, u get the desired dragon in the 1st try. u don't have to take a crap shoot try to guess the right combo's with the right lvl. i personally did it 4 times and got the desired dragon the 1st time around each time. if u decide to try it out and it works for ya, pls just post a reply in my thread to let us know it worked for u, gl!