Hey guys

I used to be the type of lifter who did the same routine of exercises week in week out for all muscle groups. I did, like most lifters when they start, gain a good amount of weight and saw decent enough strength increases. However,it soon got to the point where the gaining stopped. I then started at a new gym and started training with different guys and began changing my routine up all the time and again, strength increases and size followed. I added more calories over the last four months and have bulked up nicely (still defined though for a clean diet of 4400 cals ED) but even that progression has levelled out now. The thing is although Im still alternating workouts every week, I feel like im not making as much progress as I should. For example, I do bench press one week and the following week I do dumbell press. My bench is still creeping up slowly,but my dumbell lifts have been on the same weight for a while now. I didn't know if I should change it up again and go back to a set routine where I use the same exercises week to week for a few months just to try and push through this plateau and get the weight increasing more quickly again? Again, an example being just do bench presses each week for a while to get that up instead of doing dumbells every other week? What you guys think? Thanks