I need some recommendation for ampr and crit xtals/ gears /armors

Like the title said, I'm pretty much fragile after I played again because I gaveaway all of my items (for more details, please search the keyword big giveaway). So any of you have some good current gears recommendation with high ampr or crit xtals/ armor/ gears that can keep my ampr to 50 and 100 crit with low budget. Thank you in advanced.
This is the testing clip I've done on Bubble Bogey, I'm still pretty much rely on decoy here and my main goal is to put decoy away. That's all!

 

Food buffs. If you're a katana user then utilise shukuchi. Just step backward 1m after every attack.

 

Food buff is really helpful. Level 8 food give 22 crit rate and 22 ampr. Shaved ice hat should be really cheap although i prefer bear hat. Most event also have crit rate add which has their own pro and con. Old fc armor and weapon should go for a discount on cb. And xtal. Pick ur poison between King Piton, Zelbuse, Gespenst2, Yashiro's Mom, Seele Zauga or good old Crit rate +5.
Tapir xtal should still be reasonable price or go for zoe (zarth is pretty costly). My acc has a set of ampr avatar with 20+ ampr with the set that i use when the situation called for. Or use skill giving ampr depending on what weapon u use. Total mp pool also add to ampr. Katana also have Kairiki which is IMO the best non decoy ampr skill.

 

lil empress garb - boss version. MP+500 and AMPR+10, so basically is AMPR+15.

for critical, try get death samurai sword 3 from yashiro event, it’s give +100 CR and HP+4500.