He mainly summons abominations, he just has the largest hire pool in the game because he can hire non gremlin constructs which adds a lot of choices. I know people who have a whole case of malifaux that is just leveticus. He works good with his core group though if you do really like him and keep expanding your options. I prefer having different crews opposed to a whole money pit on one crew though. The dreamer comes with alps, daydreams and a coppiluis so pick up ude just need 3 more models for the rest of his summoning. Stiched together being one of those work very good in many nb crews. When you for sure choose a faction and expand to other boxes your choices will multiply just from the options in each box. If you got pandoras box and the dreamer for example the stiched together and insidious madness can work good in both. When i first started i found things like that to maximize my options. Ultimatly you need these options because you need to be flexible with the game strat and scheme. If you play with same crew and no extra options or masters people will counter them and you will struggle with certain games. Like i said though, once you learn the game and models youll know where to expand