The reason why samson went wiz 3 is so that he has surespell and quickcast.
Surespell allows you to use psychic pressure without interruption from normal attacks by mobs. Which means you can cast Icewall PP with significantly less interruption.
Also while all cryo spells are on cooldown, you can go with psychic pressure on the boss which is not too bad for damage even at level 5 with quick cast +50% magice damage attribute.
Quick cast attribute also increases damage from icewall shards so its still a bonus.
As for cryo 3, I think CC of cryo 3 is not very worth it. I think that the main problem is the long cool down of all the skills. I think Chrono is better if you want CC support.
And the reason why I go linker 1 at first is to help with leveling, magic missile and hangman’s not, while some might say it is not very good at linker 1, i think it is just enough level to end game ++ where linker 2 would be good.