Not sure what others think, so take this FWIW. This yeast is an aggressive fermenter. I'm thinking a single smack pack into a 1.052 beer is not going to be a problem. The other reason I say this is that folks (apparently) intentionally underpitch this into Hefs in order to bring out more banana esters. Here's a quote from Wyeast's website:Is it absolutely necessary to make a starter for this. I've never made one before and don't have any of the equipment and I'd like to make this hefe on Sunday.
"The classic and most popular German wheat beer strain used worldwide. This yeast strain produces a beautiful and delicate balance of banana esters and clove phenolics. The balance can be manipulated towards ester production through increasing the fermentation temperature, increasing the wort density, and decreasing the pitch rate. Over pitching can result in a near complete loss of banana character. Decreasing the ester level will allow a higher clove character to be perceived. Sulfur is commonly produced, but will dissipate with conditioning. This strain is very powdery and will remain in suspension for an extended amount of time following attenuation."
https://www.wyeastlab.com/com_b_yeaststrain_detail.cfm?ID=135
Just my opinion. Usually I'm a big fan of starters and have never been concerned about overpitching. I may try this again with just a smack-pack for comparison's sake.