So basically you don’t get double attack speed for the ice wall and cafrisun is the bane of all ice walls 
It’s better if you will check it yourself but I think so too.(btw like zhouyu47 said I know for sure too that linking ice walls won’t help…it was rly mentioned multiply times X) )
On the other hand I think attack speed would work from chrono and I dunno if daggers or staffs hit faster.
Daggers hit faster but the staff I’m going to use gives its damage + 200% of your MATK which basically makes you melee viable. Also, the trick with linking your ice walls together and then hitting them should still work.
I suppose it only utilizes attacker’s physical damage stat now, that means power staff won’t do since it deals magic attacks (and if it really only use stats it can be easily confirmed: you need to hit the wall with autoattack, then with skill, compare damage and that’s it. Just need somebody to test it). Not sure though. In iCBT2 it was caster’s matk, then they changed it to something ridiculous (I guess it was caster’s secondary physical attack), then they changed it to something else, which isn’t clear (Well I don’t know, people say it depends on attacker’s stats instead of caster’s now. There is a rumor that holding a weapon with high physical attack while attacking the wall with pressure increases the damage output).