Back before soulstones were around i used to run with gm parry on my necro temp, and i decided to trade that off for tactics one day so lost parry then.
So i decide to start parry again after soul stones came and i trained it up to about 98 and then accidently deleted it by putting another skill on with the parry arrow down. It took me more than a year to start again but finally trained up parry once more. So i've trained parry 3 times on siege.
and i did hiding once too