I always looked at the Scorpion and said, "This should have an infantry bay" - pity that isn't possible within the rules.
Beyond that, for the old SCP-1N, another option I liked was making it a bigger Jenner, dropping the PPC for a brace of mediulasers and heat sinks. For an odd duck route, drop both PPC and SRMs, go with 4 MLs, a token LRM-5 for range, 12 SHS and another two tons of armor to help it survive in close. Don't like the LRMs? Really go bigger Jenner and run an SRM-4 in its place.