This is another broken event in the game. Presumably both factions will be able to conclude the event. this is true for most assault battles. Grade 3 of ground combat or you have JKL or nothing. I don't know how the phoenix r7 would do in the challenge, but the investment account never closes. from SLKR I need 6 pieces of stun 5 to open the event, to take the 8 phoenix to relic are 14 stun gun.
More urgent things like at least the increase in galactic power ranges for TW and GAC are not on the staff's radar, imagine arranging two tiers of a monthly event that occurs with 1/4 of the frequency of TW.