Like before the list doesn’t rely on any gimmicks but options to complete certain task across the board. The list will be able to hold its own against other top tier list but even with mechanized Imperial Guard it’s going to be a slugfest.
The basic idea is to run with your hammer/spear out in front which would be your thunderhammer terminators in the LRC flanked by two Rhino squads. Depending on who you are playing and mission objectives I would almost combat squad these every time so you are able to bring your missile launchers to bear on transports and alike. If you are playing mechanized IG you have to run these guys up as fast as you can, pop smoke and then hope next turn you can make it there to hit the lines. Behind the LRC I would hide the Land speeders so they would be able to come out from behind the Land Raider second turn and hit targets on the flanks or key targets that you want to either destroy or buy yourself time to get into the lines. examples are such things as going after Medusa, Leman Russ, Company Command squads with three or four plasma guns and Vindicators, whatever has a high AP 2 weapon or high strength value that can be dished out in high volume.
The Drop pods force your opponent to either reserve everything which allows you to buy time on getting closer to them, or deploy and risk his high value units and “fortified” positions. If you’re going against IG and they want to deploy everything on, first drop on the flank and have the pods be supported by the Land speeder storm squad. You buy yourself more time and either they have to deal with the force on the flank or the hammer unit coming straight for them.
The key with this list at least in my mind is forcing your opponent to make decisions he doesn’t want to make puts him in positions to make mistakes and capitalize on them. The Thunder fire cannon is just there to slow down units, root out people in cover or deal with horde size units.
Have the Drop pods drop down to a flank with a locator beacon and get ready for the second turn deep strike with land speeders and your other drop pod. When the Land Raider comes in just push it down the middle and have the Rhinos join them to put added pressure on your opponents force. It’s going to come down to how well you can do in turn thee and four to see how you will win the game though.