Other notable servants:
- esports Waver
Main thing as to why they’re so popular is due to the two strategies they enable. The first is to just taunt and then die. Either eating an enemy ST NP or to trigger whatever CE to help you get a boost in battle. The main CEs for this are George’s bond CE, 500 Year Obsession, and The Merciless One. Honorable mention: Battle of Camlain. Usually this strat is used either to buy time, eat an enemy NP with plugsuit, or set up a solo with Herc or QSH or the like.
Second strategy is for when you want the skill effects, but still need things to die. Bit more tricky as most servants don’t have a taunt in their kit, so it’s usually enabled with the Poster Girl CE. Using waver as an example, keeping him at minimum level but having him still get all three skills, so he’ll end up being like level 70 10/10/10 or something. His skills are just as strong, but he will die easier, which you can rely on. This helps speed up fights, as you can more quickly stack your buffs without needing to use plugsuit. Faster clears being the desired outcome; killing your enemy fast enough that you don’t have to deal with problems down the line like when buffs fail or your enemy gets break bar buffs stacking and survival becomes more difficult.
Really just personal preference on enabling a variety of strategies.