1G after cam install boost questions

[91tsiawdtalon4g63]

I got some gsc s1 cams installed about two months ago... thing is it would drop boost from 25psi to 18psi When first installed, before cam install it would be 23-20 on a hybrid 20g using a Joe p mbc. I've been told it's floating valves, engine is taking in more air so raise boost, and I've read to up wastegate spring pressure, tial 44mm mvs I put in the big boy springs for 20lbs. Now I can hold 21 psi but while turning up the boost is doesn't increase... I'm not running lean 11.3 on 93 using link but on stock cams I was pulling much harder and with the same exact setup except stock cams. So any help on how to get the boost back? I've blt and fixed as many leaks as I've found, mbc biss couplers, but it just doesn't seem to help any.