Refinements:

R1: Gladiator

If there are at least 2 opponents nearby, ATK is increased by 16% and DEF is increased by 16%. If there are fewer than 2 opponents nearby, ATK is increased by 24%.

R2: Gladiator

If there are at least 2 opponents nearby, ATK is increased by 20% and DEF is increased by 20%. If there are fewer than 2 opponents nearby, ATK is increased by 30%.

R3: Gladiator

If there are at least 2 opponents nearby, ATK is increased by 24% and DEF is increased by 24%. If there are fewer than 2 opponents nearby, ATK is increased by 36%.

R4: Gladiator

If there are at least 2 opponents nearby, ATK is increased by 28% and DEF is increased by 28%. If there are fewer than 2 opponents nearby, ATK is increased by 42%.

R5: Gladiator

If there are at least 2 opponents nearby, ATK is increased by 32% and DEF is increased by 32%. If there are fewer than 2 opponents nearby, ATK is increased by 48%.

Your support is more valuable than a primogem.