The following tools should be added for optimal performance:

➤ Panzer Vulpaphyla Viral Procs for passive Damage Buff

➤Status Spreader Corro/Heat e.g. [Zakti], [Epitaph] or sth similar
Corro + Heat stripping Armor up to 90% together buffing our Damage once again passivly! (50% by Heat over 6 Seconds, additioinal 80% by Corro at 10 Procs)

➤ 100% Armor x 0,5 x 0,2 = 10% Armor remaining!

Adding these factors together give us a Damage Output of up to 100k with Riptide (Ulti) under optimal conditions (Test: 20 Heavy Gunner Lvl 185 with 10% Armor left)

➤ Rest & Rage for Debuff (alternative Roar but Rage is bit better ~10-20%). But since we cant use subsumed Abilities on Merulina, Roar would be the better choice for some of you.
Using the Augment you dont have to spam the Ability all the time!

Also your Water Blades gain a huge benefit by these Damage buffing factors!

➤ [Preparation] is just personal preference and can be swapped!