I am whm 57 and i use stoneskin blink and ice spikes all the time and it has saved me from death many times you just need to use it at the right time for it to last.Eg fighting an IT bomb in garbage city selfdestruct would mean goodbye to me but stoneskin sves me i loose it but only get hit for 58-100hp instead of 880-1000 hp see big diff there.reraise is an hour long protect and shell are 30min if you have the right one for the right lv.EG protect 4 on a lv 20 would only last 10min or so if your lucky.
The update has improved the exp loss so for raise you get back 50%now but the mp cost is still 150 and 200 for r2 i think where the mix up might come from is if you have blm subed it will sometimes cut that mp cost a little its one of the job traits.
In a prty i will always cast reraise on myself and if they didnt like it then they can get another whm and good luck finding one that wont cast rr on themself like a post said it not only save us a lot of trouble but the prty to so a good prty will understand that.In a long time now i finaly soloed a d bat in garlage took a while lol but i did it feels good lol now if only we were just as good at soloing IT ;) ----nah on second thought nm.
hope that helped a little.