Hi, I play ragnarok since 2016 and since I have always noticed some issues(besides all the bugs ofc). I play mainly as Monk and Sage, and about these and some other classes skills I thought about changes that would certainly improve the game and, most importantly, the independence of some classes.
I'll talk about balance changes that i think would benefit the game experience and also talk about class independence.
But, lets begin talking about a Crusader skill.
The issue with Grand Cross (GC):
Ragnarok has its personal math, and by that, it makes it very specific with numbers. But Ragnarok its a game that definitely does not benefit from self inflicted dmg, and 20% from a skill that does not deals that load of dmg, seems very, very unjust. GC is a skill that bases its dmg on ATK and MATK, inflicting it in AoE form and by being holy property, it becomes very useful when against undead and demon mainly. But no, Its not very useful. You, in any scenario, will not be able to lvl solo with this skill. Besides the dmg being LOWER than the Knights Brandish Spear, the skills also rely on the user having a big health pool aswell as high DEF stats for sustaining not only mob dmg, but the dmg that is self inflicted. In its actual form, its almost impossible to a build focused on GC because:
20% is too much HP to lose in a single skill
Deals medium AoE dmg
Crusader MATK will come only from INT status most of the times, making MATK a very low % of the skill total dmg
Resolution: Make the self inflicted dmg be "tankable" by res. to holy property and MDEF, or simply remove it, at all, increasing the SP cost and/or reducing the dmg.