Topping now or another few days ?

4 plants in a 2x2x5 tent will be cramped. Are you only planning on topping once? I have 6 plants in a 3x3x6 and I just switched to flower. I only topped the plants once and then kept placing a screen over the plants every other day to keep them short and spread the canopy while also tying the main branches down. Four of the plants are bag seeds of do-si-dos I recently got. So, I wanted to be prepared to throw a couple plants away if they end up male or hermie. I don't fully wish to flower 6 plants in a small tent. I filled a 5x5 with 4 plants before with 2 month veg. Please be careful with how long you veg in such a small space. I would recommend 4 weeks or less of veg time for your situation. Top once or twice and let the girls bounce back, then flip to flower. It doesn't look like there is anything to LST at this point. Wait a week or so after you top and then you might have some branches to LST. I would really look into Scrog methods for a 2x2 tent or just 1 or 2 plants for your next grow. With lack of space you will give yourself a few challenges. With overcrowding you may end up with stretchy larfy buds of lesser quality. Good luck and please keep asking questions!