General

Warrior stuff is generally the most expensive out of any other class.
Very easy to train with Demon Cry (Hits 15 Mobs + 20% EXP + DROP)
Yes, it was very fun training my DS only part that held me back was warrior equips' prices XD
But Demon Slayers are also pretty strong too

I highly doubt Demon Slayers are weak, considering that Demon Cry is an optimal skill for training. I think they play fairly well and that funding would be the same as funding any other warrior/str class.

i dunno about weak, i made one and with a few 4% str purple senior pieces and an okay axe at level 120 i'm not feeling weak when doing easy bosses or regular training

really weak class but would be good if you put funding into it because of its versatile skills. but so weak