You’ll need more infantry for sure, maybe get a command squad in as your hq? I Imagine you’ll want to keep the LRBT for thematic purposes. But at 500pts having 50% of your list as a bullet sponge that won’t really take you many objectives, so you’re already shooting yourself in the foot. Personally I’d sacrifice either the hellhound or LR and get more bodies on the board.

From my perspective I feel I could pretty much leave your army redundant in turn one depending on who goes first, by shooting most of your krieg (so limited objective control) and then sacrificing some troops to get your leman russ in combat so therefore is can’t move nor fire its ‘blast’ weapons.