Aigyr aka Fluffybirb here.
My credentials: I have played shifter for around 2.5k hours over 2 years in the past. I kinda like the class.
As I'm out of the loop on current meta and my gameplay knowledge is 2 years old at this point (I'm on strike until they fix shifter), I'm not going to suggest any specific numbers. Below is an idea I've had for a while on a way to make sure shifter forms are 'competitive' or at least effective to be used in pve as well as integrate some RP themes or 'fun' into the class.
Shifters in lore are shapeshifters, creatures that transcend form and can adapt to most any situation. I think a neat way to make this possible with the class is finding some way to let them 'learn' new forms like languages by interacting with or defeating mobs. This could represent their 'understanding' of a form, and what it means to be that creature, as well as add a level of engagement into the system that will keep players engaged with the actual world of Arelith. It would be like learning languages or ranger's studied enemies, where a shifter can use a tool to become a mob they can see. They become a copy of that mob with it's character sheet, stats, abilities, weapons, etc. From here it would sit in a buffer of temporary shapes, pushed out as new shapes are recorded. To save a shape and commit it to memory and represent a true understanding of that shape, they would need to kill mobs as it or kill that mob. Preforming enough of these actions will commit the form to memory, allowing the shifter to bring it up at any time. This would hopefully save you time by just copy NPC blocks, models, etc, and if you keep the shifter's gear stats being transferred over, they can still compete against the same mobs in the same area because they have that player edge. As players progress in level, they can take stronger forms and commit new forms to memory/understanding. This would likely work on all mobs except epic bosses due to their sheer power/numbers. I'm not sure how we would make this collection system work, but I think the concept would be super engaging for people playing shifter. It would also allow them a lot of freedom in how they approach situations.
Alternates to this idea would be having some form of 'signature' forms that is a smaller pool they earn through above means. I think that shifters at their core are beings that can fit a lot of molds and adapt to most situations. It was said before, they are a jack of all trades.
Starfish's idea is also exciting, allowing players to focus down paths to various playstyles of forms. Overall, every form needs a bonus to numbers across the board to be in line with at least a summon. It's painful to watch a group of summons do more then I ever could. Please make changing shapes a free action once per turn, a full turn of flat foot just to be able to fight back sucks so hard
I'll likely keep adding to this thread as I think of new ideas and to discuss with others have. I want to say I'm so happy that shifter is finally getting the love it deserves. It's a class with so much potential and has created so many amazing RP situations from my own experience.
Finally, the best forms for RP are as follows: Wyrmling, Rakshasa, Kobold
Fight me.