The Shop Event currency used in this event is Crystal Notes.
For context, one run in Mega Firmus: 30 Serum gives ~70 Crystal Notes.
Farming Tips
There is a chance while in Mega Firmus stages that an NPC will spawn into the area next to you, finishing a conversation with them can either result in the NPC fighting alongside you (it one shots all mobs) or attacking you.
It is advised to speak to these NPCs if they happen to spawn into the area, you can avoid fighting the NPC by choosing not to finish the conversation by walking away if their lines are hostile in nature.
Defeating the NPC also immediately clears all multi-challenge attempts, so provoking the NPC and defeating them is also a viable farming strategy, although there may be a certain element of difficulty as the NPCs will be buffed.
Event Shop Tips
It is not generally not recommended to redeem gifts such as Frog Accessory and Weapon Coating Blueprints for F2P players as they can be seen as a waste of Serum and event currency, these items have mostly aesthetic value and will make no difference to your progress.
In United Phalanx, a team consisting of 1 to 4 players will have 30 minutes to clear a Core Threat (Boss) and Trial Challenge (Buffed Boss).
Players can share one Construct with their team to be used while clearing zones and Core Threat, Constructs shared with the player cannot be used in the Trial Challenge.
One Player can only clear 4 out of 8 Zones to obtain unique buffs, players cannot clear the same zone twice.
A zone can be cleared by multiple players which will upgrade the buff given up to level 2 only, it is not possible to upgrade the buff higher than this number.
The team has to clear at least 2 zones to challenge the Core Threat
There is a 90 Second time limit to clearing the Core Threat.
After clearing the Core Threat, players will be given the chance to challenge the Trial Challenge, which will be a buffed version of the Core Threat's Boss.
There is a 5 minute time limit to clear the Trial Challenge.
Completing the Trial Challenge will only award more points for players to be ranked competitively for more rewards on the leaderboard, just clearing the Core Threat will be enough to clear the bi-weekly mission.
Daily Event Missions can be completed daily, and Bi-Weekly Mission will be reset every 3 days.
At the end of the week, players will be ranked on a leaderboard based on the highest score they have obtained in United Phalanx and will be given rewards based on their rank.
General Tips
It is recommended to clear United Phalanx up to defeating the core threat at least once a day to claim its daily rewards/completing 1/3 of the bi-weekly mission.
Do take note that even if your team clears the core threat without your help, it is still considered as a Boss defeated in the bi-weekly reward requirement.
It is possible to finish the Bi-Weekly mission in one shot, doing so might cause you to neglect United Phalanx daily missions so how you clear these missions is up to your discretion.