Combo nr3 and combo nr5 won't work, you forgot that
lich ability costs 1 Mana and you just get 1 from the Moonvessel.
Heartless summoning doesnt reduce the cost of the
Lich ability.
You can cast Moonvessel for 0 Mana but you always will have to pay 1 mana for
Lich's ability to cast it again so makes no sense. You get 1 Mana and you have to pay it again for casting. Same for combo 3.
Instead take
priest of Urabrask plus
Perilous Myr, this wil work=instant endless dmg
Nevertheless Combo 1 and 2 are fine, although when
Myr Retriever Combo's are quite hated a lot, cuz its just too eazy to find out.