Question about dagger mastery, critical strikes and scythes

Please answer the folowing questions.

1. Do any of the dagger mastery's efects(critical chance double strike chance) apply to other weapons.

2. Does the aditional critical chance from critical strikes apply to other weapons like scythes.

3. Can I use lead, offhand, dual attacks with scythes?

4. Are there any green scythes?

5. Is a A/D viable? And will it be able to spike like a pure assassin or at least close?

1. no
2. yes
3. no
4. yes
5. there are a few builds, recent changes to a few assassin enchantments however make the builds slightly less viable.

Doublestriking only applies to daggers.

Yes. Critical Strikes increases your chance to land a critical hit with any weapon (including spellcasting weapons).

No. Lead, offhand and dual attacks are all dagger attacks and may only be used while equipped with daggers.

Yes, there are green scythes. Google up the GW Wiki and hunt for green scythes on there - it will tell you what stats each green scythe has and which bosses they drop from.

Yes, an A/D is viable (any combination is viable with a little work). Although to really keep the spiking aspect, it would probably be better to stick with daggers as the weapon choice for the attack chains. Personally, if I was running an A/D I would go for Critical Strikes, Dagger Mastery and Earth Prayers (I speak from a PvE point of view here)

If the skill is "blacked out" on your bar while wielding a scythe, then it's a dagger attack, can only be used while wielding daggers.

Something like Palm Strike "counts as" an off-hand attack but you can use it with any weapon. (It's also attributed to critical strikes, however.)

thanks for the help