Celtic Heroes

How are the items useless if he decides to change classes?

If anything it's a great investment since their worth will only increase over time due to how powerful they are.

I don't know, event lux seems to be much better than lower level tier items until 210 event boss. Also, mage items are hard to sell at lower tier. Finding a mage, etc.
I also did not just mean the 140 event either. I meant, wait before bounding sigils, certain lux and equips etc.

The neck is definitely not useless. For a level 160, the only other way to get fire storm points is aggy rings.