Stubborn flyguy reply...
IMHO - it ain't the sluggo, it's the lead head. With such currents, the lead head bites right down to the sand and reaches perhaps 50%-100% greater distances of the average fly guy.
I have outfished the sluggo guys on occasion but only in spots and structures where fly techniques can overcome the lack of lead.
Tides and locations play a huge role, but the #1 is presentation technique in these conditions. Clearly the leadhead provides an advantage in any river mouth, but - I get little satisfaction out of catching a striper on spin gear and that's why I fish, satisfaction. To each his or her own.
falling off slippery soapbox,