I strongly suggest you to check if you have the same level as Tel Harsha. Since every 1 level of difference it takes advantage against you, and every 1 stage of difficulty makes it harder.
Second suggestion: nowadays Evasion stat in ichor are dispensable, you can replace it by Accuracy. So it will be: CON INT SPR Crit Crit Resitance and Accuracy (the most generic Ichors are like that).
Third suggestion: you do not need 3 Stone Whales on your character, 1 is enough. I suggest you to use 1 Gazing Golem (to activate Pain Barrier in order to prevent knockdown, knockback and stagger), 1 Stone Whale (it activates when YOU attack, so 1 is enough to proc it) and 1 May Card (Crit Rate up) or 1 Velnicius Card (Accuracy up).
Fourth suggestion: invest in your common attributes, they are activate in all of your characters. So, get as soon as possible lv 100 on Critical Rate, Critical Resistance, Accuracy, Block Penetration and Evasion.