I don't think 20 Saurus will hold up long. Maybe with some Life buffs, but I suppose Soulblight could help them. Death is obviously a good lore, but I'm not seeing a lot of synergy with your list generally speaking. Dropped LD and some panic tests, but not a lot else. Besides the typical sniping.
A lot if dodgy units (evasive) and shooty, but I don't see a lot if meat in the list frankly. Having said that I do think it could do well in some matchups, though not so well in others.
Edit: not much advice I realized (sorry), but I don't know what your model pool looks like nor the play style you have in mind. Those two pieces of information would help in offering something constructive.