there was Animal Taming, Ninjitsu, Alchemy, Animal Lore, Veterinary, Archery all was max. hard to retrain that
Buy a legacy or mythical token and train 5 skills to 90, that is the best advise I can give you.
The taming side will be harder ones to retrain but with time is possible,
Ninja has its moments it gets hard, but using skill on ring/brace you can overcome the thresholds and train it rather fast, Only high levels does it get slow.
Alchemy is not hard to train, just time and reagent consuming. You can train 0-GM in about an afternoon.
About asking for 100m or more for a soul stone, well most times when I house goes IDOC means the person is not going to come back, so why hold onto garbage as its no use to the IDOC person.....
Rarely do you get people coming back very soon after the house has fallen, most times years later which makes it justifiable to throw the stones to the bin for points.
Also not trying to be mean of anything, as DJAd said, you do get a pretty big warning telling you, you gonna be losing the house in the other shard so dont be salty about it, just read and be more careful next time.
Or even put your most valuables in your bank!