Clearing 1-17 while keeping up the grind.

These coulple of days Ive been grinding those uc weapons, I finally have my 3 weapons, an helmet and armor, I wanted to get full uncommon items before attempting 1-17 HOWEVER afte 20 repeats I was able to beat it with 3 uc weapons, 1 armor and 1 helm,

then i hit another wall at 1-19

I wouldve liked full uncommon gear since I tried the material abyss before and wasnt able to complete it so of course the shard abyss was going to be impossible right? well someone cleared it so I gave it a shot, the best I could do was reducing the boss hp to 10 bars, the healer and tank bosses were quite tough, my best tries were vs ruby and rin (Down to 10 hp bars),I'll keep grinding a bit before trying again.