The Multi-Mode Resource Constraint Scheduling Problem is an NP-hard optimization problem. It arises in various industries such as construction engineering, transportation, and software development. This paper explores the integration of an adaptation of the Longest Processing Time heuristic to initialize the Variable State Independent Decaying Sum for the MRCPSP. This adaptation prioritizes tasks with a longer duration in all possible modes. Experimental evaluation demonstrates a 10% faster average computation time compared to default VSIDS, and the average deviation to the optimal solution is improved from 0.080% to 0.050%. These two findings combined show a minor improvement in using the LPT to initialize VSIDS values for the MRCPSP. Using the LPT also to initialize the default increment parameter, did not seem to yield any positive results.