Well basically, if you don't have thana, Just go for crit built breaker.
I personally think that crit is way better that ice pick, yeah you get the thana effect but you have way less damage optimizer towards the emp compared to the 4 slot crit swords.
And Ice pick only gives much really, you have to spend stats on str and dex, which would give you less hp compared to when using the legendary or donate swords for sinx that gives bonus stats for the class.
I started as a crit breaker til i could afford a thanatos card, I tell you, ice pick just ruins the balance of your stats, it's just a pain trying to adjust around it when you have an easier option. Yeah it could work for low rate servers but not in this server, you would just be out damaged by any other breaker. unless you have all the luck in the world, then it could work.
Full build crit breaker vs. Full built Thana breaker = Thana has the advantage on last hitting due to the double attack, but full geared crit breakers have a huge hp pool and a descent damage output. difference between the two is that let's say the crit breaker deal 36k damage to the emp, it just stays like that. let's say the thana breaker does 23k damage to the emp, there's a 50% chance of it raising to double.
Both breakers a re still very viable in the server, but IN MY OWN OPINION and experience, ice pick is just a no no, even if it's slotted.