Hi,
  I was wondering what other clannies block/prefer for Morvran?
  Thanks!

It's worth taking a look at this list about Morvran's assigned slayer creatures. Here you can see the total weight of the slayer creatures.

IIRC, the more weight a creature has (ex: Airut has 16 weight), the more likely you are to be assigned them.

So, taking that into account, if you really hate airuts, it's worth blocking them, if not, don't. If you hate killing Kal'gerion demons, I wouldn't block them as they only carry a weight of 5 - So getting these is pretty slim unless you prefer them.

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I'd highly suggest blocking the following slayer creatures though, regardless of their weight:

• Grotworms
• Nechryael

Yes and greater demons unless you do the task at kril in godwars which makes it good xp also it all depends if you want good xp or money

I would have a look at this
https://docs.google.com/spreadsheets/d/1IhSCK44OTH9ECgw7UhhK84tL52tJQlCc31f6xhX3vbs/edit#gid=0

Something I would prefer:
Airuts
Edimmus
Ripper Demons
Crystal shapesifters
Shadow creatures
Celestial dragons

Something I would prefer:
Airuts
Edimmus
Ripper Demons
Crystal shapesifters
Shadow creatures
Celestial dragons

Prefer all of the above apart from Shapeshifters and Rippers

You guys are AWESOME!!!

Is it worth buying aquanites, tormented demons, or glacors?

Aquanties no, tormented demons are more trouble than they are worth as you need to switch weapon style and are long to get to, but glacors yes, they drop ragefire, steadfast and glavien boots as rare drops and are fantastic magic xp