Hi, please suggest an affordable studio flash for wedding reception photography as well as for covering rituals, currently shooting on Nikon D3300, with 18-55(rituals & reception) & 35 f/1.8(for portraits). Also have Sb700 as main flash. I tried using two 3rd party flash as optical slaves their batteries gets exhausted within 90 minutes. Looking for AC powered flash. Many are suggesting Godox SK400II kit, currently my budget is not that high, I do consider that kit when I upgrade to full frame. Did tried Digitek porta light kit still images turned out to be underexposed.