Instead of letting a mod place the blocks, increase your physical inputs.

Defensive players can build walls and enclosures around beds or capture points in a fraction of the standard time. Server Anti-Cheat and Ban Risks

Most fast block place mods allow you to tweak a few key settings to get the best performance.

If you prefer using vanilla Forge instead of an all-in-one PvP client, follow these steps to install a Fast Place mod: