Due to the scarcity of these new materials (each 6★ Operator requires 60 and 20 of each respectively,  plus more Module Data Blocks) and the high regular material cost of these upgrades (7 Tier 5 Materials and 220k LMD total from Stage 1 to Stage 3), it is incredibly important to be able to prioritize which Module Upgrades to focus on and to discern between which ones are not worth the hassle, which ones are, and up to which Upgrade Level.

This tier list will focus on the relative strength of the Module Upgrade exclusively.

This will not rate the overall viability of the Operators post-module, but instead how strong these Module Upgrades are and how much they boost the Operator's performance individually.

Operators in this tier will feel significantly more powerful with their Module Upgrades, even going from Stage 2 to 3.

Operators with Module Upgrades whose boosted Talents are multiplied by a Skill are very likely to end up here, as the effect will be boosted multiple times.

This upgrade boosts Ch'en's ability to support other Operators with the adequate SP recovery type further, but most importantly it significantly improves Ch'en's skill uptime, addressing one of the biggest issues she has.

Simple as it may seem, this upgrade massively enhances the performance of Skadi's Skill 2, giving her great helidrop capabilities and an skill uptime of over 75% (without Potentials).

If the previous Module Upgrade was focused on improving the value of Skadi's second Skill, this one does the same for her Skill 3.

This Module solves that with a rather large SP boost upon swapping back to her original version on top of dealing twice the Arts damage compared to Stage 1 and with 20% extra slowing abilities!

This Module Upgrade variant seeks to fix that, giving him a better uptime so he can call down thunder and lightning upon his enemies more often.

Usually Module Upgrades with this sort of effect barely increase the crit chance of each attack by ~5%, but Meteorite's boosts her own by a whopping 20%, which will be quite meaningful for her high-damage Skills.

As little as an 8% boost looks on paper, Franka is one of those Operators whose main Skill actively interacts with their talent.

As with the previous Operator, Ethan's Module Upgrade is boosted by his Skill 2 quite significantly, resulting in an 84% chance to bind per attack compared to his former 75%.

Not only that, but the duration extension also means he is now able to permanently keep enemies bound without the need of any Attack Speed boost at all, which makes Ethan one of the biggest winners where Module Upgrades are concerned.

Extremely simple, but this small boost of 13% is enough to massively propel Cutter's skill uptime, letting her use her skill much more often.

These Operators have Module Upgrades that are as powerful as (if not more than) the ones in the previous tier, but hit their big breakpoint at Stage 2 and don't get as much of a boost from Stage 3 to immediately deserve it.

Operators in this tier will perform perfectly fine with their Stage 2 Module, and won't miss much if you don't go all the way to Stage 3.

While the effect of Ling's Module Upgrade is the exact same as Magallan's [Y] Module Upgrades, the former takes much more advantage of its practical effects due to her Skill 3 fusion mechanics.

This effect will very quickly boost Nian's Attack and Defense to 15% permanently, making it quite a large stat boost for essentially no setup.

It's worth noting that the Stage 3 effect is also nothing to scoff at, granting her a total of 6% extra Attack and Defense and 3 SP per Shield layer broken.

The Stage 3 upgrade further boosts the Arts hit by another 5%, so it might be worth considering if you use his Skill 1 very often.

The second part of this Module Effect boost means Flamebringer will no longer have to defend a lane by himself for half an hour to avoid any killsteals.

If you are willing to go the extra mile, the Stage 3 Module gives him an extra 300 HP through this Talent.

Though it may not seem like much, this boost allows Greyy to maintain a 100% Slow uptime with his Skill 2, aiding in his crowd control mechanics. .

The Module Upgrades in this tier are still strong enough to consider purchasing Stages 2 or 3, but they are not as impactful as the ones in the previous tiers.

Module Upgrades in this tier often consist of small Attack, Attack Speed or Crit Chance boosts that result in negligible DPS gains (~100 for most Operators)!