Totally! ... you could even proxy machines too. Demolisher makes a great stand in for Morrigu.
Or just 'upgrade' your tech. Even mild-upgrade using the improved weapons from S.O. (clan standard ACs are one crit and one ton less, ... they have improved SRM (I like these better than the half-weight ones), I LPL, I PPC, I LL) -- all were basically stop gap weapons from standard IS tech to full clan tech. But, are not that bad.
Demolisher could go with 2 Imp AC-20 ...
There is full upgrade of the Burke in the Golden Century TRO -- quite effective (3 clan LPL !!! ... wait, maybe 2)
Manticore could go with Imp PPC, Imp LRM (pretty much same as standard clan, but min range stays ... again, I think), Imp SRM (totally worth it, imo ... goes 12 hexes), keep the ML ... it's a ML, never bad.
Any extra tonnage can go to ammo, armor, electronics, etc.