I was told by a friend that I should skip t5. They never explained why so I wanted to know if it really is a tier I should skip
People usually skip T5 as it saves money. 4 T5 is 1 T6. That kind of gives it away. It's so easy to just skip tiers due to cat cafe. I would say fill your dorm with a few T5 for plunder.
You can get 1 or 2 t5 if you want, but if you do, don't level them up? it does help a little for plunder but t6 is best option. I kinda regret getting t5. Waste of money
I have a few alts that I've been trying different upgrades with...I advice skipping most of t4 and t5. Don't upgrade the t4's past level 2, then put in a few t5's because they do give a good boost in plunder. Now I am skipping most of t6 too because they are really expensive. I have been telling my tutors to move through t4, t5, t6 as soon as they can afford the next tier.
I a few for extra money & started getting t6s, now I'm skipping t6s. No point wasting money on a tier if I will definitely be evicting them later on.
I'd do t5 l2 and then move on to t7. That way your plunder will be decent enough to put in t7s without it taking way too long.
If you can, you should go from t4 lvl 4 straight to t7s because t5 and t6 give way less stats for the same money comparing between tiers. 33 t4s level 4= 388 kcs = 125 B total value, if my math and memory are right. 3 t6 lvl 1= 156 kcs= 120 B. They don't worth and t5 worth even less! Skip them but DO upgrade t4s.