Yeah LI isn't ideal either, but it's hard to make other suggestions without knowing the skills. Low Post or Inside Iso could be options, but LP needs good flow to reach the bigs (HA/PA), and II needs good driving and some HA/PA on your bigs besides the scoring of course, as they will be creating for themselves and need to pass the ball if they don't find a good option.
The problem seems to be that your team is not balanced at all, more than 6x salary difference between starters is not a recipe for succes.