Techincally green shell would have been fine for the second strategy. For Hitman you need to use his Blindspot to stack, so if the doge is stalled futher up hitman won't miss, But Warlock and Pierre doesn't attack little doge at all. So it doesn't matter where you stall lil doge. Make sure you have 2 green shells at any given time, and then you can stall lil doge anywhere to spawn infinite warlocks without worrying about your base health. [Edit] Techincally you don't even need Warlock and Pierre. Since you can stall infinitely, as long as you have a "targets only" unit that does 42k or more and a lot of time on your hands, you can easily cheese the base
I did it with saki's true form lv50 and an attack up sm combo. I needed 16 sakis to one-shot the base. It took me 11 tries. In one of the failed attempts, the lil doges destroyed my base which had only about 10k hp because of the sir rels. The funny thing is that I was on my 16th saki when that happened. I just needed to kill the doges and advance to the base but alas 😅