There is, however, one "stat" "system" that could be in place and would be the only one that actually matters for this forum; HP, MP, And Damage.
Restraining ones self to just these three properties would keep the forum free and give the needed regulation where it is needed and nowhere else leaving you free to roleplay as you want to roleplay but given order when it counts.
DAMAGE should be a calculated value that is a variable on a given rank, No more of this BS "S-rank damage" or "D-rank damage". D-rank damage gets replaced with 1-20 damage. C-rank damage gets replaced with 10-40 damage. B-rank becomes 20-80 damage. A-rank becomes 40-160 damage. S-rank becomes 80-320 damage. H-rank becomes 160-620 damage.
The number listed on the left is a "Low damage" spell while the right is a "High Damage" spell, while a middleground would be the average damages.
HP Itself would be somewhere in the realm of five times the given damage counts as HP per rank, so on average a mage should at least be able to resist 3 same-rank spells or at most around 8. The minimum being for a mage that relies more on spellpower, so they have less health as they are more frail but in turn could tap into higher damage output or higher damage resistance to their spells. The maximum being for a mage that boasts high defense and vitality, such as slayers though the maximum would not be a slayer thing, slayers would just be high. Maximum HP mages would be a Metal or Earth slayer, or any other mage who relies on a strong sturdy magic that influences their body.
And with that you already have a usable foundation from which to work with. How much damage did you take from that spell you just got hit with? It says right there in their app "Deals 45 damage" or "Deals 5 damage per post" or "Deals 5 damage per second the enemy remains in the burning area".
This provides clear and easy to understand information anyone can easily adapt. Your slayer deals double damage to a dragon? Well now you know what that actually means. 50 becomes 100. 130 becomes 260. What did it hit for? Well the dragon had 1,500 HP so keep trying. This also cures the ridiculous method of measuring boss powers. "Takes 30 hits of A-rank damage!!!" How much damage do you do with that boost? Well it's 25% boost, so your 100 just became a 125. Or you 100 became a 75 because of that 25% resistance.
This gives everyone what they want, few people actually WANT a stat system. I don't know why or when the stat system craze influencing staff agendas started. THIS gives ORDER while retaining FREEDOM through ease of rules, and variability in having a lot of room to work with to design unique and varied spells.
Nothing else, no arbitrary strength, power, or intelligence stats, no lists of available skills. Just leave it at HP, MP, and Damage. That's all that is needed.