Start by saying that with the CLI introduction and bottom feed measures the game is more balanced and welcoming for solo players and limited greatly the reliance in big aliances. (Not to create a discussion round this topic just personal opinion, im sure many miss this reliance)
Smaller player pool size.
1. Hope the above will assist in attracting new players.
2. Currently players may be using their precious time to manage multiple accounts.
3. Previous did find this frustrating in the past as personally don't have time to manage one account let alone multiple, and would never use such a strategy.
  3.1 My stance now is that these guys should be appreciated by increasing the numbers of such a small players pool and possible targets. 🤣

Challenges

Multi use for upfeeling.
Multi use for up casting. (TS, offensive and friendly spells)

Suggestion:

Limite the KS different that you can send aid to. ( if you similar size you can share exchange resources, if a small kingdom 100 times of your size exist to supply you he shouldn't be able to)
1.1 Would use similar metrics as bottom feed measures. 70%/ 130% differences
1.2 If not capped then a Trump tariff should apply of let's say 80%. (Could be related to he KS difference too)
One can only cast within your range. Same for offensive or as defence. 70%/130%
2.1 or outside that your chances are severe decreased of succes as it happens for offensive spells.
EQ spells damage should be capped at similar army attack damage level.

Sugguestion back ground:
Without naming anyone .
Recently been in some enjoyable battles some won some lost great joy as it should be . And no points to raise here, is s great to see the damage done on lost battles too.

However few notes:

I have casted a TS on a Kingdom few days ago and they had something like 500k of wood. No saying they get unlimited supplies but unless there are super powers in their morning wood porduction (...) does look a bit suspicious. Few other TS seen from colleges in the same group of players shown really hight numbers for Iron unused being in such a demand.
Every time you are attacked by a specific group of players (same group as above). The TS' are casted by a group of small Kingdoms everytime is needed. I had 3/4 being castled before an attack (retal from previous attack win)(which I lost no issues here as it was a great hit and to see the attacker (losses) but the fact that a player can use 3/4 different Kingdom 10% of their and my size to castle ongoing TS's to a luxury of seeing your tic production (as they were casted every w/3 tics from similar size players, but never the attacked needed to use his own wizz resources) and possible unlimited friendly spells don't seem right. Specially when I have over 1:1 schools and over 10k wizz all 3/4 TS''s should've been reflected 99.99% of then time.

This would remove the talk around multis and stop the benefit of their use. And remove the need of Devs spending time in looking into Kingdom activities, while maybe encourage the Multi users to actually grow their multis so there are more targets Available at there personal time expense.

Hopping this creates a positive discussion around the topic that could improve the game play. And seen it many times before there is a great deal of brainstorming int he community when the focus is improvement and moving forward. Not saying my suggestion would be implemented but any of this nature that would have the same outcome would be appreciated.

War in the game, peace in the forum debates🙂