AL and crystals question

So um hi! I had an old samu but i eventually changed her to mins, but i still do know a thing or two about samurais, so here goes!
First thing that i noticed (assuming that your an auto samu cuz of your set up) that you need to either replace monty with huge cherry blossom (HCB)or replace your catura with soul sucker fang ns or SSF. Whether or not u have high eva, hp, or def, you are still bound to get those random high damaging skills from bosses. So i suggest that you get those two equips which give an auto of recovering your hp chance by attack(Of course this is also affected by auto%).

Second thing is about your dilemma on which ai you should use that is more effective. My suggestion is for you to focus more on magic/melee r% and rate cut%. Why? Basically resistance is like a more effective version of mdef/def, plus you can get a max of 95% melee/magic resistance(You cannot exceed that). So with 95% resistance on both, all the raw damage that your supposed to receive will be halved by 95% (correct me if im wrong lol). And with that 5% left damage is where rate cut comes in, it helps halve more damage that your supposed to get. 


And lastly, i would suggest for you to at least add 50 crt stats at some point, because even thought one of your passive skills give 1 crt per lvl,the crt stats that it adds will still not be enough to compensate how much crt you can possibly get due to lvling crt stat apos. Essentially, even if you overcap at 390 it will still not be enough to supply that leftover space for you to max your full crt potential. 


Oh and overall, other than these things that ive pointed out, your samurai is in pretty good shape!