So I ended up making a different set for Assassin's who are more Backstab focused
(my stats are Int Crt Str 54 vit 255 dex) I tested it out in Joshuca when a guildie needed help ^^; we had a full pt Bish x 2 Servant and me Assassin.
The set was
Genius Max Hp+20%
Thief Garb LU King Poofer
Sieger Plate Iniliba
Myrica ns
This set worked out for the first half of Joshuca, but I was seriously underprepared for the battle xD I realize now that in order to solo/tank Josh with that much hp Guild Revita is needed LOL. Nevertheless, we pulled through and managed to beat Joshuca.
I have to retest again but my new set is now
Genius Iniliba/Jade Ricus Veltria I need to get Rate Cut lv 5 for this one.
Thief Garb lu Iniliba Rate Cut 4
Sieger Plate Gashadororo Melee Def. lv 5
Quick Cool add, along with -0.5 sd from Sauro II al.
Myrica Iniliba hp lv 5
My focus for the set was defense, I'll probably test on Joshuca again when another guildie needs help xD.
Right now I plan to farm a Lucioscudo and slot it with Gashadororo, once I unlock my 2nd al page I'll be focused on all red al Vulschem, Malti, Magonza etc, and
then make a different set with King Pooferfish xtals which could be used in parties.
Edit: Tested it out solo on Joshuca and the set works! Even without my 2nd AL page, the only downside of course is Guild Revitas and Remagics. Seriously won't be trying that again for a while it's such a pain. 
