Artanis' Power Field placed badly at start

Read above. Oxstar wants suggests Artanis to have 25 extra starting SoA to be able to place the badly placed Power Field when using P2.

How would that not stack with the starting SoA mastery? And if it doesn’t stack with starting SoA Mastery, then putting more than 21 points into SoA (for 63 starting SoA) goes to waste since you won’t get that max above 290.

PS. Yeah, I get that ppl shouldn’t be banking their SoA to let it come even close to 200 or 290 but it exists and it happens.
PS2. If the implication is to assign mastery points and spend 25 SoA to replace that badly placed field…jeez.