Disclaimer, I have had fun playing Amelia, however as this is a negative review, i'll be delving into the significant drawbacks to her.
Amelia is basically only good as a frost mage, half her skilltree and such is based around mental damage which guess what? there are very few cards for mage that do mental damage.
most of her items are also unique to the rift map events, forcing you to go specific paths to have a chance to get a good item for her;
these rift events are only available in act 1, 2 and 3, and are not present in the final zone, so unless you happen to get a corrupted item, you're probably not getting a duplicate.
She would be much better as a mage/healer hybrid as that would allow her to actually get cards that do mental damage. She would also be better if her items appeared in the store, or if mental damage cards were added to the mage list.