Okay so I've been researching. I'll preface by saying that I believe Liverto and Kzarka weapons are exactly the same except Liverto is +3 crit while Kzarka is +3 attackspeed (players have tested and figured out there MIGHT be a slight difference in Accuracy growth stat, but that is just a theory and unproven).
Everyone says that for Blader, you got Kzarka weapon and Grunils set to max out as many skills you can (At least +5 attackspeed and +5 crit, but also go for movespeed, HP, and even cast speed). So let's say I'm a Blader. I get the Kzarka weapon, which gives me +3 AttackSpeed. I gem it with two gems, both giving +1 crit and +1 attackspeed. Now my weapon alone gives me 5 AttackSpeed 2 Crit.
I take my Grunil gloves and gem them in with one +2 crit chance gem and one +1 crit chance gem (because it's cheaper, and there is no need for +6 crit chance) I take helm, gem it with +4 Cast Speed, now I have 4 of that. My chest I gem with 200HP. My shoes I gem with 4 movespeed
The set effect gives me +150HP from chest-shoes combo and then +5AP from helmet-gloves combo with another +2AP from full set
In total I'm now
5AS
5Crit
4CS
4MS
350HP
7AP
I also have the added hassle of having to enchant a whole new armour and weapon set, as well as risk losing millions of silver upon death because half my stats come from very expensive and very fragile gems.
Now, if I use Liverto weapon and Agerian armour instead of Grunils and Kzarka:
Agerian Helm gives Stun/Stiffness Resist. I gem it with +2 Cast Speed.
Agerian Chest gives 50HP. I gem it with 100HP gem.
Agerian Gloves give +1 Attack and Cast Speed. I don't gem it at all.
Talis Shoes give me 2MS. I gem with another 2MS for 4MS in total.
Set effect gives me another 100HP for 2 items and +2 attack/castspeed for 3 items.
Liverto Weapon gives me +3 crit which I gem with two +1 crit and +1 attackspeed gems.
I now have
5AS
5Crit
5CS
4MS
250HP
25% stun resistance
Free gem slot in gloves for any other thing I might need (whatever goes in gloves anyway except for attackspeed and crit??)
Compared to Grunils, I now have the same Attack Speed and Crit, +1 Cast Speed, the same Move Speed, -100 HP, -7 AP and +3 DP (Agerian gives 1 on each armour piece than Grunils, while Talis is the same, or so I've heard). Oh, and one free gem slot in my gloves.
And the most important added bonus that I won't have to spend a lot of silver changing items, and if I die I don't risk losing nearly as much as I do with Grunils, as most of my power is bound with the armour/weapons and not gems.
So tell me reddit, where am I wrong and why should I use Grunils/Kzarka over Agerian/Liverto? This issue doesn't let me rest, there must be something I missed.